The new C 63 AMG Coupé Black Series: The most powerful C-Class of all time
Spectacular design, technology transfer from the world of motorsport and driving dynamics at the highest level. The new Mercedes-Benz C 63 AMG Coupé Black Series embodies the AMG brand claim of “Driving Performance” like no other AMG model.

In visual terms, the most powerful C-Class of all time consistently continues the tradition of the previous Black Series vehicles. The style of the C 63 AMG Coupé Black Series is also inspired by the successful SLS AMG GT3 customer sports car – particularly when fitted with the optional AMG Aerodynamics package, which is dominated by the fixed carbon-fibre rear aerofoil.

smart fortwo electric drive – the third generation
Local zero-emission driving with even more driving fun – the third generation smart fortwo electric drive.

In total a five-figure number of vehicles will roll off the production line in Hambach, France. Following the huge success of the second generation, electric mobility will then become accessible to anyone interested in more than 30 markets worldwide. riven by a battery supplied by Deutsche Accumotive for the first time the 55 kW electric motor passes the 120 km/h mark. The 17.6 kWh battery enables the lively city car to travel around 140 kilometres in city traffic without producing any local emissions.

The new B-Class
Substantially more agile and efficient, but as comfortable and spacious as ever – the new B-Class is a winner on all fronts. The vehicle’s lower height and more upright seat position provide for a first impression that hints at the compact sports tourer’s dynamic credentials.

The new B-Class is a typical sports tourer, offering plenty of space combined with impressive dynamic performance as a hatchback saloon. The characteristic lines of the exterior design indicate both of these attributes: front and rear sport a width-emphasizing design. High-quality materials and finely structured surfaces, stylish details, precision workmanship and a new spaciousness – the interior of the B-Class defines a whole new benchmark in the compact segment.

The new SLK 55 AMG
he Mercedes-Benz SLK 55 AMG is the most powerful SLK of all time. Its newly developed AMG 5.5-litre V8 engine featuring cylinder shut-off combines the ultimate in performance with the lowest possible fuel consumption.

Forming part of the third-generation of the SLK launched in March, the new top-of-the range AMG model already demonstrates its individuality even at first glance: distinctive AMG light-alloy wheels, specific AMG bodystyling with AMG spoiler lip and two chrome-plated twin tailpipes at the rear complement the classic roadster proportions, while adding a markedly athletic touch. The expressive design of the SLK 55 AMG is both eye-catching and unmistakable.

F 125! research vehicle
As a highlight marking 125 years of the automobile, Mercedes-Benz is presenting a visionary outlook on future technical developments in the luxury segment. The F 125! research vehicle anticipates future trends and prepares the way for implementation of an innovative premium concept for large, luxurious automobiles.

In the F 125! Mercedes-Benz rigorously follows its vision of emission-free driving with hydrogen power, underlining the potential of hydrogen as an energy source for the future. While previous Mercedes-Benz research vehicles have “looked ahead” by roughly one vehicle generation – seven to eight years – the F 125! as the latest technological visionary goes a whole step further, by more than two generations to the year 2025 and beyond. On this basis the F 125! was created as an innovative four-seater luxury saloon with a powerful, emission-free electric drive system based on the fuel cell technology developed to series production maturity by Mercedes-Benz. This study combines pioneering and highly efficient storage, drive and bodyshell technologies with unique control and display concepts. The research vehicle also presents itself with an expressive design which transfers the classic Mercedes design idiom into the future.

Source: Daimler AG

The new-generation C-Class
The new C-Class is a comprehensive modernisation. The front and rear sections of this bestselling model have a more striking design.

Together with the optional high-resolution colour display in the instrument cluster, the new dashboard with its elegant, grained surface and prominent decorative trim emphasises the premium character of the interior. A total of more than 2000 new components distinguish the latest generation of the Mercedes-Benz C-Class from its predecessor.

The new Mercedes-Benz SLK Roadster
With the completely newly developed SLK, one of the most exciting and successful sports cars ever built is entering its third generation. The new roadster uncompromisingly takes driving pleasure and open-air enjoyment to a new level.

It blends light-footed sportiness with stylish comfort, a striking sports-car design with total suitability for everyday use, top performance with exemplary ecology. What’s more, the SLK is proud to present the world premiere of the panoramic vario-roof with MAGIC SKY CONTROL, which switches to light or dark at the touch of a button.

Daimler Celebrates the 125th Anniversary
Exactly 125 years to the day after Carl Benz registered his “vehicle with gas-engine drive” under patent number 37435 with the Berlin Patent Office in 1886, Daimler AG has celebrated the anniversary of the automobile.

Approximately 1,400 invited guests were hosted by the inventor of the automobile at the Mercedes-Benz World in Stuttgart. The evening was moderated by Desirée Nosbusch with guests of honor including the German Federal Chancellor, Dr. Angela Merkel, and the Prime Minister of the federal state of Baden-Württemberg, Stefan Mappus. They mixed with international guests from the automotive industry and the fields of politics, business, sports, society and the media, as well as members of Daimler’s Board of Management, Supervisory Board and many Daimler employees.

Around the world in 125 days – Mercedes-Benz F-CELL World Drive
As part of the ceremony to mark the 125th birthday of the invention of the motor car on 29 January in Stuttgart, German Chancellor Dr. Angela Merkel and Dr. Dieter Zetsche, Chairman of the Board of Management of Daimler AG, fired the symbolic starting shot for the Mercedes-Benz F-CELL World Drive.

Setting out from Stuttgart on 30 January, three Mercedes-Benz B-Class vehicles featuring local zero-emission fuel cell drives are undertaking a 125-day circumnavigation of the world. Travelling across four continents and through 14 countries, the three B-Class F-CELL vehicles will head around the globe once, finishing their “world tour” back in Stuttgart where they started.

The C-Class Coupé
What more dynamic way to celebrate the invention of the automobile? The expressive C-Class Coupé sees Mercedes-Benz, now in its 125th year of corporate history, entering a new market segment and for the first time offering a compact coupé with classic proportions.

From the side, the new coupé beguiles the onlooker with its flat silhouette with powerful shoulders and narrow C-pillar in a classic three-box design. A highlight in the interior is the coupé seats with integral head restraints and single seats in the rear, thereby demonstrating the car’s sporty credentials to the driver. The dashboard reveals a strong, sporty and high-quality design including three tube rings with a galvanised finish. A large section of trim is a high-quality part of the dashboard instrument panel.

Source: Daimler AG

Ola Källenius, Chairman of Mercedes-AMG GmbH
“A top performer for fuel economy and maximum output: with the new SLK 55 AMG we have created a real masterpiece. The naturally aspirated AMG V8 engine sets an outstanding example for efficiency, while at the same demonstrating the creativity and expertise of our engineers, who took their inspiration from Formula 1 when developing the cylinder shut-off system.”

Tobias Moers, Head of Overall Vehicle Development and Board Member
of Mercedes-AMG GmbH
“A sports car engine with technology taken from Formula 1 – I am convinced that the new SLK 55 AMG will meet the high expectations of all sports car fans. Talented driving dynamics are firmly embedded in its genes, and as such the eight-cylinder roadster provides exhilarating driving pleasure.”

Friedrich Eichler, Head of Engine & Powertrain Development
“Thanks to the innovative AMG Cylinder Management system and other high-tech components, our newly developed AMG 5.5-litre V8 engine achieves the fuel economy of a four-cylinder engine with the muscular power delivery and emotional sound experience of a V8.”

Mario Spitzner, Head of Branding and Marketing
“As the only eight-cylinder roadster in its segment, the SLK 55 AMG is a unique vehicle. As a result it is the perfect embodiment of the AMG brand claim of ‘Driving Performance’.”

Source: Daimler AG

The high-tech M152 powerpack enthralls with a combination of advanced technologies which is unequalled anywhere in the world. No other petrol engine features direct injection at a pressure of 200 bar, spray-guided combustion and piezo injectors, in conjunction with map-controlled cylinder shut-off, an all-aluminium crankcase with “spectacle” honing, four-valve-per-cylinder design with continuous camshaft adjustment, a high compression ratio of 12.6:1, a ECO start/stop function and generator management – while revving to a maximum speed of over 7000 rpm. All these measures lead to high thermodynamic efficiency, which is a precondition for high efficiency and low exhaust emissions.

Moreover, deciding in favour of a large-displacement, naturally aspirated eight-cylinder unit with cylinder shut-off resolves the conflict of aims between high output/torque delivery and decidedly low fuel consumption levels. The reduction in fuel consumption of 30 percent compared with the previous model represents a quantum leap forward.

AMG Cylinder Management cylinder shut-off system
It is the AMG Cylinder Management cylinder shut-off system in particular – completely newly developed by Mercedes-AMG – that significantly improves efficiency: cylinders two, three, five and eight are shut off under partial load, which lowers fuel consumption considerably. In similar form this technology is also used in the approx. 750 hp V8 engines found in Formula 1. As efficiency also plays a major role at the pinnacle of motor racing, four or six cylinders are disabled by shutting off the fuel injection when the driver has lower load demands, e.g. when cornering at slow speed, in the Safety Car phases or for pit stops. In the case of the M152, the intake and outlet valves also remain closed. With a fuel consumption of 8.4 litres and CO2 emissions of 195 grams per kilometre (NEDC combined), the naturally-aspirated AMG V8 engine ranks at the same the level as its competitors, however these are unable to match either the output or torque of the SLK 55 AMG – and above all, they do not use large-displacement eight-cylinder engines.

The cylinder shut-off function is available over a wide engine speed range from 800 to 3600 rpm if the driver has selected transmission mode “C” – Controlled Efficiency. The AMG main menu in the instrument cluster informs the driver whether cylinder shut-off is active, and whether the engine is currently running in four or eight-cylinder mode. No less than 230 Nm of torque is still available in four-cylinder mode – enough power to ensure plenty of acceleration in most driving situations. As soon as the driver has a need for more power and leaves the partial load range, cylinders two, three, five and eight are activated. The switch from four to eight-cylinder operation is immediate and imperceptible, leading to no loss of occupant comfort whatsoever. At an engine speed of 3600 rpm the activation process takes no more than 30 milliseconds.

Valves closed, fuel delivery and ignition deactivated
This is made possible by intelligent interaction within the highly effective engine management system, with 16 hydraulically variable compensating elements and a complex oil supply system in the cylinder head. The variable compensating elements are integrated into the cylinder heads, and keep the intake and exhaust valves of cylinders two, three, five and eight closed. At the same time their fuel supply and ignition are deactivated. This reduces the load-change losses of the four deactivated cylinders, and at the same time also increases the efficiency of the four remaining cylinders. This is because the operating point is transferred to the higher load range.

All-aluminium crankcase with Silitec cylinder liners
The crankcase of the naturally aspirated AMG 5.5-litre V8 engine features a diecast all-aluminium construction. The low (dry) engine weight of just 187 kilograms is the result of uncompromising lightweight construction methods. The bearing covers for the main crankshaft bearings are made of grey cast iron and are bolted to the crankcase, from beneath as well as on the sides, for high rigidity.

The piston rings are carbon-coated to minimise internal friction and optimise wear characteristics. Cast-in Silitec cylinder liners ensure low friction for the eight pistons. So-called “spectacle” honing is another measure to reduce friction and therefore fuel consumption: in this sophisticated process, the cylinder liners receive their mechanical surface treatment when already bolted in place. As honing would no longer be possible with the cylinder head installed, a jig resembling spectacles is bolted to the crankcase. The cylinder liners distort as if the cylinder head were in place, and are only then given their mechanical surface treatment. As a result, any static distorsion of the cylinder liners caused by tightening the cylinder head bolts can be completely eliminated. The positive effect of this process is reduced frictional losses.

Other measures to optimise efficiency include:
- weight-optimised cast aluminium pistons with special piston skirt coating
- optimised ventilation holes in the crankcase
- oil pump with electrically controlled pressure stage
- separate oil pump for cylinder shut-off as a controllable, low-friction vane cell pump
- engine cooling on the particularly efficient cross-flow principle
- electronically controlled fuel pressure, fully variable and demand-related between 100 and 200 bar

The forged crankshaft made of high-grade 38MnS6BY steel alloy rotates in five main bearings, has six counterweights and has been optimised with respect to torsional rigidity, inertia, low rotating masses and a long operating life. A two-mass viscous damper mounted at the front reliably eliminates vibrations. Each connecting rod journal on the crankshaft carries two forged, cracked connecting rods.

Four-valve technology with variable camshaft adjustment
Perfect charging of the combustion chambers is ensured by large intake and exhaust valves, of which there are two per cylinder. The exhaust valves, which are subject to high thermal loads, are sodium-cooled and for weight reasons also hollow. Four overhead camshafts operate the 32 valves via low-maintenance, low-friction cam followers. The infinitely variable camshaft adjustment within a range of 40 degrees on the intake and exhaust sides depends on the engine load and engine speed, leading to outstanding output and torque values. This also results in consistent idling at a low speed. Depending on the engine speed, valve overlap can be varied for the best possible fuel/air supply to the combustion chambers and efficient removal of the exhaust gases. The variable camshaft adjustment is carried out hydraulically via four pivoting actuators. These are electromagnetically actuated and controlled by the engine control unit. The camshafts are driven by three high-performance silent chains, which have considerable advantages in noise comfort compared to cylinder roller chains.

ECO start/stop function as standard
The ECO start/stop function further contributes to the low fuel consumption. This system is standard equipment in the SLK 55 AMG, and permanently active in the fuel economy transmission mode Controlled Efficiency “C”. Once the driver comes to a halt e.g. at a red traffic light, the naturally aspirated V8 engine is automatically switched off. Once the brake pedal is released or the accelerator is depressed, the engine is immediately restarted and the car is able to move off quickly. Intelligent technology guarantees a comfortable and immediate starting procedure: a crankshaft sensor which recognises the direction of rotation registers the resting position of all eight pistons. For an automatic engine start, the cylinder with the most favourable piston position receives an injection of fuel into its combustion chamber. The precise piezo-electric injectors greatly assist this process, as they make particularly fast starts possible. The M152 always starts in eight-cylinder operation.

The engine management ensures that the engine is only switched off if certain preconditions are met. The starter battery must have sufficient charge, for example, and the engine must be at the necessary operating temperature for efficient emissions control. The same applies to the interior temperature selected by the driver: if this has not yet been reached, the engine is not switched off when the car comes to a stop. The onboard network management system makes sure that active audio, telephone or video functions are not interrupted by the ECO start/stop function, and that the air conditioning continues to operate.

A framed “ECO” symbol in the AMG main menu shows the driver that the ECO start/stop function is active. When cylinder shut-off is active, the driver is informed by the symbol “ECO4″, while “ECO8″ stands for eight-cylinder operation. Should one of the above criteria be preventing activation of the system, this is shown in the central display by the message “Start/stop inactive” and an “ECO” symbol with no frame. In the two more performance-oriented driving modes “S” (Sport) and “M” (Manual), the ECO start/stop and cylinder shut-off system are deactivated. If required, the driver can also switch the systems off while in “C” mode. In this case neither a “start/stop” nor an “ECO” symbol appears.

Generator management helps to save fuel
A generator management system makes a further contribution to fuel economy: whenever the naturally aspirated V8 engine is on the overrun or when braking, kinetic energy is used to charge the battery rather than being wasted as heat in the usual way. In all other operating modes a combination of onboard network and generator management enables the generator to be kept at a low voltage. This reduces the load on the engine and makes for fuel savings of around 0.15 litre per 100 kilometres according to the NEDC standard, and up to 0.2 l/100 km in city traffic with its frequent overrun and braking phases.

Highly efficient engine electronics for every function
All the engine functions are executed and controlled by a particularly efficient Bosch MED 17.7.3. control unit. This state-of-the-art engine computer not only controls the direct petrol injection, cylinder shut-off and variable oil supply, but also communicates with all the other onboard control units. The microprocessor has more than 30,000 different parameters and functions stored in its memory, and is able to perform up to 260 million individual operations per second. To reduce the load on the engine control unit, the eight individual ignition coils have an integral electronic module known as an ignition amplifier at each cylinder. These ensure a strong ignition spark at all engine speeds and under all load conditions. Eight high-voltage powerstages are responsible for highly precise actuation of the piezo-electric injectors.

New AMG sports exhaust system with integrated exhaust flaps
For the first time AMG is using a sports exhaust system featuring an exhaust flap on each side. This technology resolves the conflict of aims between an emotional sound when driving in a sporty manner and a more discreet engine note in the partial load range. The main focus of the sound design was on achieving a perfect synthesis of perceptible dynamism and the long-distance comfort that is a hallmark of Mercedes.

Each of the two rear silencers has a flap which is variably activated on a logic-controlled basis depending on the driver’s power requirement and the engine speed. At low loads and engine speeds below 2000 rpm the flaps remain closed. This causes the exhaust gases to cover a longer distance and flow through an additional damping element, so that the engine sound is pleasantly subdued – resulting in a harmonious sound impression, especially in four-cylinder operation when cylinder shut-off is active. When the driver accelerates, the flaps open at an angle of 15, then 30 and up to 50 degrees so that some of the exhaust gases cover the longer, acoustically dampened distance and some the shorter distance. This produces a sonorous engine note. Under full load at higher engine speeds, in performance-oriented eight-cylinder operation, both flaps are fully opened so that the occupants are able to enjoy the decidedly muscular sound typical of an AMG V8. In short, they are left in no doubt about the performance potential of the 310 kW (422 hp) naturally aspirated AMG eight-cylinder engine.

The two-pipe AMG sports exhaust system with two chromed twin tailpipes on each side has a pipe diameter of 65 millimetres from the manifolds to the pre-silencer. The diameter is reduced to 60 millimetres from the pre-silencer to the rear silencers.

Effective emissions technology with new catalytic converter boxes
Low exhaust emissions, compliance with country-specific standards and a characteristic engine sound – the requirements for the exhaust system of the new, naturally aspirated AMG 5.5-litre V8 engine were manifold and complex. The SLK 55 AMG complies with the current Euro-5 emission standard, as well as meeting all the requirements of the US market (LEV-III standard, On-Board Diagnosis II).

Air gap-insulated manifolds ensure a rapid catalytic converter response. For efficiency and to save space, this concept has a tandem catalytic converter housing on each side of the vehicle: adjacent to the firewall, two thin-walled ceramic substrates are grouped into each housing. This solution makes the previous, additional underbody catalytic converters unnecessary. The two ceramic substrates differ to ensure rapid and efficient emissions control: the front one is coated with palladium, while the rear one has a bimetal coating of palladium and rhodium. One lambda sensor per row of cylinders is located in front of each catalytic converter housing, and there is a lambda diagnostic sensor between each of the two thin-walled substrates.

Long tradition of powerful AMG V8 engines
As is typical of AMG, engine production is carried out by hand in the AMG engine shop. An engineer assembles the AMG 5.5-litre V8 engine according to the traditional “one man, one engine” philosophy, from installing the crankshaft through to adjusting the camshaft as well as fitting all of the wiring. An AMG engine badge bears the signature of the responsible engineer.

Powerful eight-cylinder engines are an inseparable part of AMG’s corporate history. Established in 1967, the company immediately caused a stir with the 300 SEL 6.8 AMG which succeeded in taking second place at the 24-hour race in Spa-Francorchamps (Belgium) in 1971. The AMG racing saloon was technically based on the Mercedes-Benz 300 SEL 6.3 with the M100 V8 engine. With an engine output of 184 kW (250 hp) at 4000 rpm and a top speed of 220 km/h, this luxury V8 saloon with the M100 V8 engine was Germany’s fastest regular production car at the time. Classic tuning as well as an enlarged displacement from 6330 to 6835 cc resulted in an increase in output to 315 kW (428 hp) at 5500 rpm and in torque from 500 to 608 Nm.
Another important engine in the AMG story was the M117, its first eight-cylinder unit with four-valve technology. With a displacement of 5.6 litres, 265 kW (360 hp) and 510 newton metres of torque, this V8 accelerated the 300 CE 5.6 AMG to a top speed of 303 km/h in 1987. This made the coupé the fastest German car in series production, and American fans reverently christened it “The Hammer”.

The supercharged AMG 5.5-litre V8 of 2001 is another milestone in the history of AMG engine development: the M113 K delivered up to 428 kW (582 hp) and a torque of 800 newton metres. The supercharged AMG 5.5-litre V8 of the SLR McLaren dating from 2003 was even more powerful – the M155 generated up to 478 kW (650 hp) and 820 newton metres.

2005 saw the debut of the naturally aspirated, high-revving AMG 6.3-litre V8 engine known as the M156, which developed up to 386 kW (525 hp) and 630 newton metres. In the new C 63 AMG Coupé Black Series, this eight-cylinder engine delivered 380 kW (517 hp). From 2005 to the present day, more than 71,000 M156 engines have been produced – a record in the history of AMG. Exclusively reserved for the SLS AMG, the M159 likewise has a displacement of 6.3 litres and delivers a peak output of 420 kW (571 hp), with a maximum torque of 650 newton metres.

Closely related to the new M152, the AMG 5.5-litre V8 biturbo engine delivers between 386 kW (525 hp) and 420 kW (571 hp) depending on the model, and a maximum torque of between 700 and 900 newton metres. The M157 is regarded as the most efficient engine in its output and displacement class. The combined NEDC fuel consumption of the E 63 AMG is 9.8 litres per 100 kilometres.

The supercharged AMG 5.5-litre V8, the AMG 6.3-litre V8 and the AMG 6.0-litre V12 biturbo were all able to win the Best Performance Engine category several times in the International Engine of the Year Awards.

Highly versatile: the AMG SPEEDSHIFT PLUS 7G-TRONIC
The perfect partner to the naturally aspirated AMG 5.5-litre V8 engine used in the SLK 55 AMG comes in the form of the AMG SPEEDSHIFT PLUS 7G‑TRONIC. This seven-speed automatic transmission has three transmission modes: Controlled Efficiency (C), Sport (S) and Manual (M), which can be selected by means of a button on the centre console.

In “C” mode, the Roadster generally moves off in second gear and makes use of the high torque already available at low engine speeds to shift up to the highest viable gear as quickly as possible. The resulting dethrottling effect on the intake side lowers fuel consumption. In modes “S” and “M”, the engine and transmission take on a much more agile character, with higher engine speeds, more spontaneous gear changes and faster shift times. The automatic double-declutching function which is now active when downshifting as well as the brief, precisely defined interruption of ignition and injection when shifting up under full load shorten shifting times and increase emotional appeal when adopting a sporty driving style. The seven gears can be changed via the AMG shift paddles on the steering wheel. The upshift indicator integrated into the AMG instrument cluster informs the driver when a manual gearchange is advisable.
A double turbine torsional damper integrated into the transmission and fitted with centrifugal pendulum which adapts to engine speed helps to minimise vibrations in four-cylinder mode and enhances the impression of comfort experienced by the vehicle occupants.

Source: Daimler AG

These two first places put the Stuttgart-based premium-brand manufacturer at the very top of the “Golden Steering Wheel” all-time winners’ list. Mercedes-Benz has won the award, one of the most important distinctions in the European automotive industry, a total of 21 times. The awards were presented to Dr Dieter Zetsche, Chairman of the Board of Management Daimler AG and Head of Mercedes-Benz Cars, and Professor Dr Thomas Weber, Daimler AG Board of Management member responsible for Group Research and Mercedes-Benz Cars Development, in Berlin last night.

More than 260,000 readers of the German publications “Bild am Sonntag”, “Auto Bild” and their European sister publications in 22 countries registered their votes in this year’s “Golden Steering Wheel” awards. The winner of the SUV class was determined in a direct vote, so making the Mercedes-Benz M-Class the winner of the “Golden Steering Wheel” in this group. The SLK won its category after being shortlisted along with four of its competitors. In the unimpeachable judgement of a panel of experts, and after undergoing real-life testing, it too was awarded the “Golden Steering Wheel” in its category.

Readers from across Europe valued not only the M-Class’s characteristic and distinctive design and its variable interior, with that all-important sense of wellbeing, but also the excellent energy efficiency and thus environmental acceptability of this premium SUV. The permanent all-wheel drive system of the Mercedes-Benz M-Class also proved a determining factor thanks to its well-balanced ride comfort along with excellent driving dynamics, both on and off road, along with the car’s outstanding range and high level of safety.

What ultimately swayed the result in favour of the SLK Roadster in the “Golden Steering Wheel” competition was, above all, the way it manages to combine light-footed sportiness with stylish comfort, striking sports car design with absolute everyday practicality, and superb performance with exemplary ecological credentials. With the excellent performance it derives from its economical and yet powerful engines, along with technical innovations such as the unique panoramic vario-roof with MAGIC SKY CONTROL, which can be switched from light to dark at the touch of a button, the SLK takes driving pleasure and open air enjoyment to a whole new level.

This year’s double win in the “Golden Steering Wheel” awards marks the continuation of a fine tradition: with a total of 21 victories to date, the brand with the three-pointed star now leads the field of the most successful car brands to win the competition for the “Golden Steering Wheel”, a prize that has been awarded since 1976.

Source: Daimler AG

The four-cylinder diesel engine in the Roadster delivers 150 kW (204 hp) from a displacement of just 2.2 litres to give the two-seater its characteristic sporty temperament. The sprint from zero to 100 km/h takes just 6.7 seconds – true sports car performance. Apart from all this, the SLK 250 CDI is the most economical and therefore the most environmentally compatible roadster in its segment.

It is happy with 4.9 litres of diesel fuel per 100 kilometres (NEDC combined consumption).With the diesel engine in the SLK Mercedes-Benz has taken the next step in a successful strategy that began in 1936 with the 260 D model – the world’s very first diesel car. The world’s oldest motor manufacturer has continued to develop these robust and economical engines ever since and, as far back as the mid-1970s, was able to demonstrate their hitherto undiscovered qualities as high-performance units in record-breaking drives with the legendary C111-II D and the C111-III. The new Mercedes-Benz SLK 250 CDI is the logical successor to these illustrious forbears.

A certain sluggishness has been accepted as an intrinsic characteristic of the diesel engine ever since Mercedes-Benz installed one in the world’s first diesel passenger car in 1936. So wrong. Some 40 years later, engineers working for the Swabian manufacturer began to look more closely at the performance potential of the thrifty compression-ignition engine – and soon discovered what they were looking for. They fitted a turbocharger to the standard 80 hp five-cylinder engine found in the 240 D 3.0 and 300 D models to elicit an impressive 190 hp from the 3-litre diesel.

With this powerful diesel engine under the bonnet of a spectacularly styled gull-wing model, painted in bright orange, Mercedes-Benz was soon geared up for some record-breaking drives. The C 111-II D powered its way to some sensational records at the Nardo circuit in southern Italy in 1976. For a whole hour, for example, it circled the high-speed track at anaverage speed of 253.770 km/h. It went on to collect further records in all categories – over distances of 10 to 10,000 kilometres and over periods of 6 to 24 hours.
No one had previously thought a diesel vehicle capable of such performance.

In April 1978, the even more aerodynamically designed C 111-III consigned these records to the scrapheap of history, with what was by that stage a 230 hp diesel engine with exhaust gas turbocharging and charge air cooling. It set a new record over one hour with an average speed of around 320 km/h, while the average over the other record distances also never fell below 314 km/h. No other diesel vehicle had ever even come close to such speeds. With these impressive records under its belt the C 111-III was able, once and for all, to prove the reliability and efficiency of the turbodiesel engine.

While these record-breaking drives were going on, development of the production version of the turbodiesel continued apace. These efforts led in 1978 to the market launch of the 300 SD, the world’s first diesel car with exhaust gas turbocharger.

In 1997 Mercedes-Benz ushered in a new era in diesel technology with the C 220 CDI. This was the first production passenger car to feature a diesel engine with common-rail direct injection. This new technology gave the car a significantly higher output and extra torque, while also setting new standards in the disciplines of fuel consumption and pollutant emissions.

That Mercedes-Benz should now for the first time be offering the sporty SLK Roadster with a diesel engine is the logical next stage in these developments. Its four-cylinder diesel engine, with a displacement of 2143 cc, delivers 150 kW (204 hp) with available torque of 500 Newton metres – as much as a petrol-engined model with more than twice this displacement would normally offer. The new SLK 250 CDIfeatures the most powerful diesel powerplant in this class, with a thrust that propels the Roadster to a very sporty level of performance.

Equipped with the standard 7G-TRONIC PLUS automatic transmission (a six-speed manual transmission will follow in the second quarter of next year), the diesel SLK can cover the sprint from zero to 100km/h in 6.7 seconds and achieve a top speed of 243 km/h. Moreover, the flexibility of the SLK 250 CDI is nothing short of phenomenal. Thanks to its enormous diesel torque it accelerates from 80 to 120 km/h in just 4.3 seconds – easily the best figure in this class, making for safe and effortless overtaking.

Apart from all this, the SLK 250 CDI is the most economical and therefore the most environmentally compatible roadster in its segment. It is happy with 4.9 litres of diesel fuel per 100 kilometres (NEDC combined consumption), which corresponds to CO2 emissions of 128 g/km. In other words, the diesel SLK combines thoroughbred sports car performance with the fuel economy of a sub-compact. This guarantees effortlessly superior driving pleasure with great fuel efficiency.

The diesel engine achieves its exemplary output, torque, fuel consumption and emissions figures, as well as its highly impressive smoothness for a diesel unit, thanks to a series of innovative technologies. These include fourth-generation common-rail injection with precise injection timing, as well as two-stage turbocharging. Like all SLK models, the SLK 250 CDI is fitted as standard with an ECO start/stop system.
The frugal fuel consumption makes the SLK 250 CDI a car with superior long-distance qualities. Using the European motorways, it is quite possible to drive non-stop from the North Sea all the way to a beach on the Mediterranean. Very comfortable sports seats, a comfortable suspension setup and the largest luggage capacity in this segment also do their bit to create the right conditions.

As it shares the same genes with the other members of the successful SLK family, the SLK 250 CDI combines lightfooted sportiness with stylish comfort, a striking sports car design and absolute suitability for day-to-day use, while also delivering top performance with exemplary ecology. This means that the diesel version, too, provides open-top driving enjoyment at an extraordinarily high level.

Likewise, the SLK 250 CDI too is available with a choice of three versions of the famous vario-roof – one of them the panoramic vario-roof with MAGIC SKY CONTROL. This glass roof can be changed from light to dark at the touch of a button. There are also three suspension variants: a conventional steel suspension, a sports suspension with a stiffer spring and damper setup and a suspension with an electronically controlled, fully automatic damping system.

Externally the new SLK 250 CDI is no different in appearance from the petrol models. It even retains the twin exhaust system, and therefore has the same stunning looks for which all the SLK models are known.
The SLK 250 CDI demonstrates just how much Mercedes-Benz has achieved with the diesel engine. A comparison of the world’s very first diesel saloon, the Mercedes-Benz 260 D of 1936, with the new diesel Roadster, reveals some astounding developments. The 260 D needed 0.3 litres of fuel per kilowatt per 100 kilometres, whereas the SLK 250 CDI requires a mere 0.03 litres – a bare tenth of the amount. We see the same picture in terms of the power-to-swept-volume ratio: the forefather of all diesel cars, the 260 D, generated 17.7 hp from one litre of displacement, while its family’s latest offspring, the SLK 250 CDI, produces 95.1 hp – more than five times the figure. The SLK 250 CDI thus shows that the diesel engine still holds remarkable potential for the future.

Source: Daimler AG

Another highlight will be the F 125! The research car demonstrates how in the long term entirely emission-free individual mobility can be made possible in the luxury segment. Roadster performance in perfection is shown by the new SLS AMG Roadster, which also is making its first public appearance at the show. Two roadsters also have their world premieres, the SLK 250 CDI and SLK 55 AMG.

As a highlight marking 125 years of the automobile, Mercedes-Benz is presenting a visionary outlook on future technical developments in the luxury segment. The F 125! research vehicle anticipates future trends and prepares the way for implementation of an innovative premium concept for large, luxurious automobiles.

The new B-Class: new era in compact cars
Featuring a new four-cylinder petrol engine with direct injection and turbocharger, a new diesel engine, a new dual clutch transmission and a new manual transmission along with new assistance systems, technologically the second generation of the B-Class ushers in a new compact car era at Mercedes-Benz. High-grade materials and finely structured surfaces, fine details, precision workmanship plus safety equipment unique to the segment raise the standard for comparison in the compact car segment. In addition, Mercedes-Benz is showing a variant of the new B-Class with an alternative drive.

The new M-Class: refined efficiency champion
The entire model range of the new M-Class consumes 25 percent less fuel on average compared with the previous models. Outstanding, the ML 250 BlueTEC 4MATIC, which is content with an NEDC consumption of 6.0 l/100 km (158 g CO2/km) and can travel 1500 kilometres on a single tankful. Efficiency notwithstanding, the fascination of the M-Class with its unique synthesis of agility, driving pleasure and comfort is fully preserved.

SLK 250 CDI: first Mercedes Roadster with a diesel engine
For the first time, Mercedes-Benz is offering the sporty SLK Roadster with a diesel engine. The 150 kW (204 hp) four-cylinder power unit of the SLK 250 CDI puts the two-seater at the top of its class in numerous respects. The SLK delivers top figures for fuel consumption and torque. The result is superior driving enjoyment both on winding country roads and on long motorway stretches. Like the other models in the latest SLK family, which were presented in January this year, it combines lively sportiness with high-quality appointments and excellent comfort.

Show car Viano Vision Pearl: yacht on four wheels
With the show car Viano Vision Pearl Mercedes-Benz shows what’s possible in the van category. All white-and-grey leather appointments, a genuine wood floor, brushed aluminium trim, chromatic window tinting, and the Bang & Olufsen high-end sound system “BeoSound Viano” make travelling in the Viano Vision Pearl a fine experience for up to six occupants. The design concept draws on the looks of state-of-the-art sport yachts and takes up the theme “travel as an adventure”.

SLS AMG Roadster: open-top driving in its sportiest form
The technological highlights of the SLS AMG Roadster read like an A-B-C of modern sports car engineering: the combination of an aluminium spaceframe body, an AMG 6.3-litre V8 front-mid engine with a peak output of 420 kW (571 hp) and 650 newton metres of torque, a seven-speed dual clutch transmission in a transaxle arrangement and a sports suspension with aluminium double wishbones is guaranteed to make the hearts of sports car enthusiasts beat faster – while ensuring outstanding driving dynamics and roadster motoring pleasure.

SLK 55 AMG: top figures in all areas
The Mercedes-Benz SLK 55 AMG is the most powerful SLK of all time. Its newly developed AMG 5.5-litre V8 with cylinder shutoff system combines highest performance with lowest consumption. With a maximum output of 310 kW (422 hp) and maximum toque of 540 Newton metres, the SLK 55 AMG surpasses all direct competitors. Its fuel consumption is some 30 percent lower than the previous model’s. The AMG sports suspension with Direct-Steer system, Torque Vectoring Brake and 3-stage ESP plus the AMG high-performance braking system ensure very dynamic handling.

C 63 AMG Coupé Black Series: unadulterated performance
Spectacular design, technology transfer from the world of motorsport and driving dynamics at the highest level. The new Mercedes-Benz C 63 AMG Coupé Black Series embodies the new AMG brand claim Driving Performance like no other AMG model. With a maximum output of 380 kW (517 hp) and a maximum torque of 620 Newton metres, the new high-performance vehicle is the most powerful C-Class of all time. The AMG 6.3-litre-V8 engine impresses with its hefty torque, tremendous pulling power and responsiveness, and ensures high-calibre performance: the C 63 AMG Coupé Black Series accelerates from zero to 100 km/h in 4.2 seconds.

Source: Daimler AG

With a peak output of 310 kW (422 hp) and maximum torque of 540 Nm, the SLK 55 AMG outperforms all of its direct competitors. Its fuel consumption of 8.4 litres per 100 kilometres (NEDC combined) and CO2 emissions of 195 grams per kilometre are around 30 percent lower than those of its predecessor. High levels of driving dynamics are ensured thanks to the AMG sports suspension with Direct-Steer system, Torque Vectoring Brakes and 3-stage ESP, as well as the AMG high-performance braking system. A particularly appealing addition to the range is the SLK 55 AMG “Edition 1″.

Forming part of the third-generation of the SLK launched in March, the new top-of-the range AMG model already demonstrates its individuality even at first glance: distinctive AMG light-alloy wheels, specific AMG bodystyling with AMG spoiler lip and two chrome-plated twin tailpipes at the rear complement the classic roadster proportions, while adding a markedly athletic touch. The expressive design of the SLK 55 AMG is both eye-catching and unmistakable.

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The SLK 55 AMG is the perfect embodiment of the new AMG brand claim of “Driving Performance”: in the compact high-performance roadster segment there is nothing to compare to its combination of tangible driving dynamics, superior sportiness, unique high-technology and low fuel consumption. The SLK 55 AMG accelerates from zero to 100 km/h in 4.6 seconds, and reaches a top speed of 250 km/h (electronically limited).

Key figures at a glance: *

The world’s most fuel-efficient V8 engine combines the lowest consumption figures with the superior power delivery and the typical sound experience which only a large-displacement eight-cylinder engine can provide.
In line with its “AMG Performance 2015″ strategy, with the new V8 unit Mercedes-AMG is meeting its promise to continue to reduce both the fuel consumption and emissions of new models over the next few years – while reaching new heights with the central brand claim of “Driving Performance”. At the same time, AMG is also demonstrating its social responsibility with the M152.

New naturally aspirated eight-cylinder closely related to the V8 biturbo
The new M152 is based on the AMG M157 5.5-litre V8 biturbo engine presented in 2010, which powers the E 63 AMG, CLS 63 AMG, S 63 AMG and CL 63 AMG. Numerous design features are identical, such as the displacement, bore/stroke, distance between cylinders, start/stop system and direct petrol injection technology. Distinguishing features versus the M157 include the new intake air ducting, new cylinder heads, the modified valve drive, an adapted oil supply system and an optimised crankcase.

Exclusive combination of advanced technologies
The high-tech M152 powerpack enthrals with a combination of advanced technologies which is unequalled anywhere in the world. No other petrol engine features direct injection at a pressure of 200 bar, spray-guided combustion and piezo injectors, all in conjunction with map-controlled cylinder shut-off, an all-aluminium crankcase with “spectacle” honing, four-valve technology with continuous camshaft adjustment, a high compression ratio of 12.6 : 1, a start/stop system and generator management – while revving to a maximum speed of over 7000 rpm. All of these measures lead to high thermodynamic efficiency, which is a precondition for high fuel efficiency and low exhaust emissions. Moreover, deciding in favour of a large-displacement, naturally-aspirated eight-cylinder unit with cylinder shut-off resolves the conflict of aims between high output/torque delivery and low fuel consumption figures.

AMG Cylinder Management
It is the AMG Cylinder Management cylinder shut-off system in particular – completely newly developed by Mercedes-AMG – that significantly improves efficiency: cylinders two, three, five and eight are cut off under partial load, which lowers fuel consumption considerably. In similar form this technology is also used in the approx. 750 hp V8 engines used in Formula 1. As efficiency also plays a major role at the pinnacle of motor racing, two or four of the eight cylinders are cut off e.g. when cornering at slow speed, in the Safety Car phases or for pit stops. With a fuel consumption of 8.4 litres per 100 km and CO2 emissions of 199 grams per kilometre (NEDC combined), the naturally-aspirated AMG V8 engine comes in at or below the level of its competitors, however these are unable to match either the output or torque of the SLK 55 AMG – and above all, they do not use large-displacement eight-cylinder engines.

The cylinder shut-off function is available over a wide engine speed range from 800 to 3600 rpm if the driver has selected transmission mode “C” – Controlled Efficiency. The AMG main menu in the instrument cluster informs the driver whether cylinder shut-off is active, and whether the engine is currently running in four or eight-cylinder mode. No less than 230 Nm of torque is still available in four-cylinder mode – enough power to ensure plenty of acceleration in most driving situations. As soon as the driver has a need
for more power and leaves the partial load range, cylinders two, three, five and eight are activated. The switch from four to eight-cylinder operation is immediate and imperceptible, leading to no loss of occupant comfort whatsoever. At an engine speed of 3600 rpm the activation process takes no more than 30 milliseconds.

Valves closed, fuel delivery and ignition deactivated
This is made possible by intelligent interaction within the highly effective engine management system, with 16 hydraulically compensating elements and a complex oil supply system in the cylinder head. The compensating elements are integrated into the cylinder head, and keep the intake and exhaust valves of cylinders two, three, five and eight closed when cylinder shut-off is active. At the same time their fuel supply and ignition are deactivated. This not only enables the load-change losses of the four deactivated cylinders to be reduced, but also increases the efficiency of the four remaining cylinders. This is because the operating point is transferred to the higher load range. The compensating elements are compact and lightweight, allowing taut valve train operation and engine speeds up to 7200 rpm.

All-aluminium crankcase with Silitec cylinder liners
The crankcase of the new AMG 5.5-litre V8 engine features a diecast all-aluminium construction. The low (dry) engine weight of just 187 kilograms is the result of uncompromising lightweight construction methods. The bearing covers for the main crankshaft bearings are of grey cast iron, and are bolted to the crankcase, as well as on the sides, for high rigidity.

The piston rings are carbon-coated to minimise internal friction and optimise the wearing characteristics. Cast-in Silitec cylinder liners ensure low friction for the eight pistons. So-called “spectacle” honing is another measure to reduce friction and therefore fuel consumption: in this sophisticated and complex process, the cylinder liners receive their mechanical surface treatment when already bolted in place. As honing would no longer be possible with the cylinder head installed, a jig resembling spectacles is bolted to the crankcase. The cylinder liners distort as if the cylinder head were in place, and are only then given their mechanical surface treatment. As a result, any static distortion of the cylinder liners caused by tightening the cylinder head bolts can be completely eliminated.

Other measures to optimise efficiency:

• weight-optimised cast aluminium pistons with special piston skirt coating
• special ventilation holes in the crankcase
• oil pump with electrically controlled pressure stage
• separate oil pump for cylinder shut-off as a controllable, low-friction vane cell pump
• engine cooling on the particularly efficient cross-flow principle
• electronically controlled fuel pressure, fully variable and demand-related between 100 and 200 bar

The forged crankshaft of high-grade 38MnS6BY steel alloy rotates in five main bearings, has eight counterweights and has been optimised with respect to torsional rigidity, inertia, low rotating masses and a long operating life. A two-mass viscous damper mounted at the front reliably eliminates vibrations. Each connecting rod journal on the crankshaft carries two forged, cracked connecting rods.

Four-valve technology with variable camshaft adjustment
Perfect charging of the combustion chambers is ensured by large intake and exhaust valves, of which there are four per cylinder. The exhaust valves, which are subject to high thermal loads, are hollow and sodium-cooled. Four overhead camshafts operate the 32 valves via low-maintenance, low-friction cam followers. The infinitely variable camshaft adjustment within a range of 40 degrees on the intake and exhaust sides depends on the engine load and engine speed, leading to high output and torque values. This also results in consistent idling at a low speed. Depending on the engine speed, valve overlap can be varied for the best possible fuel/air supply to the combustion chambers and efficient removal of the exhaust gases. The variable camshaft adjustment is carried out hydraulically via four pivoting actuators. These are electromagnetically actuated and controlled by the engine control unit. The camshafts are driven by three high-performance silent chains, which have considerable advantages in terms of noise comfort compared with cylinder roller chains.

Controlled Efficiency start/stop function as standard
The Controlled Efficiency start/stop function further contributes to the low fuel consumption. This system is standard equipment on the SLK 55 AMG, and active in the fuel economy transmission mode “C”. Once the driver comes to a halt e.g. at a red traffic light, the V8 engine is automatically switched off. Once the brake pedal is released or the accelerator is depressed, the engine is immediately restarted and the car is able to move off quickly. Intelligent technology guarantees a comfortable and immediate starting procedure: a crankshaft sensor which recognises the direction of rotation registers the resting position of all eight pistons. For an automatic engine start, the cylinder with the most favourable piston position receives an injection of fuel into its combustion chamber. The precise piezo-electric injectors greatly assist this process, as they make particularly fast starts possible. The M152 always starts in eight-cylinder operation.

A framed “ECO” symbol in the AMG main menu shows the driver that the Controlled Efficiency start/stop function is active. When cylinder shut-off is active, the driver is informed by the symbol “ECO4″, while “ECO8″ stands for eight-cylinder operation. In the two more performance-oriented driving modes “S” (Sport) and “M” (Manual), the start/stop function is always deactivated. If required, the driver can also switch it off while in “C” mode as well. In this case neither a “start/stop” nor an “ECO” symbol appears.

Generator management helps to save fuel
A generator management system makes a further contribution to fuel economy: whenever the V8 engine is on the overrun or when braking, kinetic energy is used to charge the battery rather than being wasted as heat in the usual way. In all other operating modes a combination of onboard network and generator management enables the generator to be kept at a low voltage. This reduces the load on the engine and makes for fuel savings of around 0.15 litres per 100 kilometres according to the NEDC standard, and up to 0.2 litres per 100 km in city traffic with its frequent overrun and braking phases.

New AMG sports exhaust system with integrated exhaust flaps
For the first time AMG is using a sports exhaust system featuring an exhaust flap on each side. This technology resolves the conflict of aims between an emotional sound when driving in a sporty manner and a more discreet engine note in the partial load range. The main focus of the sound design was on achieving a perfect synthesis of perceptible dynamism and the long-distance comfort that is a hallmark of Mercedes.
Each of the two rear silencers has a flap which is variably activated on a logic-controlled basis depending on the driver’s power requirement and the engine speed. At low loads and engine speeds below 2000 rpm the flaps remain closed. This causes the exhaust gases to cover a longer distance and flow through an additional damping element, so that the engine sound is pleasantly subdued and irritating frequencies are effectively suppressed – resulting in a harmonious sound impression especially in four-cylinder operation when cylinder shut-off is active.

When the driver accelerates, the flaps open at an angle of 15, then 30 and up to 50 degrees so that some of the exhaust gases cover the longer, acoustically dampened distance and some the shorter distance. This produces a sonorous engine note. Under full load at higher engine speeds in eight-cylinder mode, both flaps are fully opened so that the occupants are able to enjoy the decidedly muscular sound typical of an AMG V8. In short, they are left in no doubt about the performance potential of the 310 kW (422 hp) naturally aspirated AMG eight-cylinder engine.

The two-pipe AMG sports exhaust system with two chromed twin tailpipes has a pipe diameter of 65 millimetres from the manifolds to the pre-silencer. The diameter is reduced to 60 millimetres from the pre-silencer to the rear silencers.

Effective emissions technology with new catalytic converter boxes
Low exhaust emissions, compliance with country-specific standards and a characteristic engine sound – the requirements for the exhaust system of the new, naturally aspirated AMG 5.5-litre V8 engine were manifold and complex. The SLK 55 AMG complies with the current Euro-5 emission standard, as well as meeting all the requirements of the US market (LEV-III standard, On-Board Diagnosis II).

Air gap-insulated manifolds ensure a rapid catalytic converter response. For efficiency and to save space, this concept has a tandem catalytic converter housing on each side of the vehicle: adjacent to the firewall, two thin-walled ceramic substrates are grouped into each housing. This solution makes the previous, additional underbody catalytic converters unnecessary. The two ceramic substrates differ to ensure rapid and efficient emissions control: the front one is coated with palladium, while the rear one has a bimetal coating of palladium and rhodium. One lambda sensor per row of cylinders is located in front of each catalytic converter housing, and there is a lambda diagnostic sensor between each of the two thin-walled substrates.

Highly variable: the AMG SPEEDSHIFT PLUS 7G-TRONIC
Power is transferred to the rear wheels by means of the AMG SPEEDSHIFT PLUS 7G-TRONIC automatic transmission which features three transmission modes: “Controlled Efficiency” (C), Sport (S) and Manual (M). The automatic double-declutching function when downshifting as well as the brief, precisely defined interruption of ignition and injection when upshifting under full load shorten shifting times and increase emotional appeal when adopting a sporty driving style. A double turbine torsional damper with centrifugal pendulum which adapts to engine speed helps to minimise vibrations in four-cylinder operation and enhances the impression of comfort experienced by the vehicle occupants.

Perfect combination: highly dynamic driving style and comfortable cruising
The AMG sports suspension with Torque Vectoring Brakes and AMG Direct-Steer system provides both impressive lateral dynamics as well as agile handling. Looking for a highly dynamic driving style or comfortable cruising? The new SLK 55 AMG is able to offer both. Independent suspension struts with stiffer spring/damper tuning, torque strut bearings on the front axle featuring higher rigidity, stiffer stabilisers all round as well as a more negative camber on the rear axle result in high cornering speeds and a low body roll in fast S-shaped bends.

In critical cornering conditions, the Torque Vectoring Brakes produce a defined rotational movement of the vehicle about the vertical axis in fractions of seconds, through selective brake actuation at the rear wheel on the inside of the bend. This results in the SLK 55 AMG steering into the bend precisely and under full control, without any compromises where dynamism is concerned. Complementing this feature perfectly is the AMG Direct-Steer system: it enhances handling and agility compared with the standard steering, whilst also reducing the amount of physical effort required when parking. A new power steering pump helps to reduce fuel consumption. The reason behind this: the power assistance for the steering only requires energy when the driver is actually steering. In addition, the AMG Direct-Steer system has a parameter function adapted to match the AMG sports suspension. This results in optimum response from the central position, outstanding road feel and dynamic handling in all driving situations.

The AMG-exclusive 3-stage ESP gives individual control strategies at the touch of a button: the ESP button in the centre console allows the driver to choose between “ESP ON”, “SPORT Handling Mode” and “ESP OFF”. The AMG high-performance brake system has internally ventilated and perforated brake discs on all wheels, measuring 360 x 36 mm at the front and 330 x 22 mm at the rear. The system is characterised by outstanding responsiveness, short stopping distances and excellent fatigue strength.

Optional AMG Handling package for even greater driving dynamics
The optionally available AMG Handling package enhances the vehicle’s sportiness even further. It comprises an AMG Performance suspension with stiffer tuning, an AMG rear axle differential lock, composite brake discs at the front and a three-spoke AMG Performance steering wheel finished in nappa leather with Alcantara® inserts in the grip areas.

Unmistakable: uniquely styled design and appointments
Classic roadster proportions with typical AMG design characteristics as well as a hint of the SLS AMG – these are the striking visual highlights of the new SLK 55 AMG. The AMG designers have complemented the exciting basic forms of the long bonnet, the greenhouse positioned well to the rear and crisp rear section with typical AMG styling at the front, sides and rear. The new AMG front apron has large air inlets and AMG-specific LED daytime driving lights. Inspired by the SLS AMG super sports car, the wide radiator grille features a large, centrally-positioned Mercedes star. In the case of the SLK 55 AMG, the slats in the radiator grille and the lower cross strut on the front apron are painted in a high-gloss black finish. Darkened clear-lens headlamps and darkened bicolour tail lamps also come as standard exclusively on the top-of-the-range V8 model. The Intelligent Light System (ILS) is also available as an optional extra.

The vent grilles with chrome-plated fins in the front wings are not only reminiscent of the SLS AMG, but also evoke memories of the famous Mercedes-Benz 300 SL Roadster from the 1950s. The “V8 AMG” lettering beneath the grilles points to the top-of-the-range eight-cylinder model from the SLK model series. AMG-specific, distinctively styled side sill panels continue the design of the front apron through to the new rear apron. With its own unique shape, black diffuser insert with three fins as well as the two chrome-plated twin tailpipes of the AMG sports exhaust system, it gives a distinctive finishing touch to the vehicle. The spoiler lip on the boot lid, painted in the vehicle body colour, reduces lift at the rear axle and thereby increases driving stability at high speeds.

Inspired by the SLS AMG: high-quality, stylish interior
Functional, stylish, high-quality: the interior design of the SLK 55 AMG is also reminiscent of its bigger brother, the SLS AMG Roadster. Associations with the super sports car are evoked courtesy of the four air vents in the style of jet engines, as well as the centre console finished in brushed aluminium. An optional addition to the centre of the dashboard is an AMG-specific analogue watch featuring an IWC design. The AMG Performance steering wheel, with its flattened top and bottom sections, also boasts metal trim, aluminium shift paddles and grip areas finished in perforated leather. The clearly-arranged AMG instrument cluster is positioned perfectly in the driver’s field of vision and features four circular instruments, distinctive dials and the AMG main menu. The switch for the transmission modes C, S and M is also located in the centre console.

The AMG sports seats with individual seat upholstery layout and optimised lateral support come as standard with the upholstery combination ARTICO man-made leather/black fabric and high-quality AMG badges in the backrests. Nappa leather and Exclusive nappa leather are both available as optional extras. As in the previous model, the AIRSCARF neck-level heating system is also available as an optional extra. This creates a flow of warm air around the neck and shoulder areas of the occupants from a vent in the front of each head restraint.

Magical: the panoramic vario-roof with MAGIC SKY CONTROL
The standard vario-roof opens and closes in less than 20 seconds, transforming the open-top Roadster into a closed-top Coupé with rigid roof at the touch of a button. Alternatively, a panoramic vario-roof in tinted polycarbonate can also be chosen. The third variant is a world premiere – the panoramic vario-roof with MAGIC SKY CONTROL. This glass roof switches to light or dark as required at the press of a button. When light it is virtually transparent, offering an open-air experience even in cold weather. In its dark state the roof provides welcome shade and prevents the interior from heating up when the sun’s rays are very intense. In other words: a feel-good atmosphere at the touch of a button.

The frames of the three roof variants are made of magnesium. This makes each roof around six kilograms lighter than in the previous model, giving the car a lower centre of gravity – which benefits its agility. A comfortable alternative to the standard draught-stop is the new AIRGUIDE pivoting draught-stop. It consists of pivoting transparent plastic layers which are attached to the reverse of the roll-over bars. This is the world’s first draught-stop system that enables different comfort levels to be selected for two occupants, as the driver and passenger can individually pivot the units to the centre of the vehicle in a flash, thus taming turbulent air flow from the rear. The advantage: no installation or removal effort required.

More individuality: designo and the AMG Performance Studio
Designed to meet the needs of those with even more individual tastes are the optional appointments “designo leather” and “designo Exclusive leather”, offering eleven single-tone and ten two-tone upholstery variants. With designo the AMG sports seats feature a specific design which distinguishes them from the standard sports seats. Available matching elements include “AMG carbon-fibre trim” and “designo trim in black piano lacquer” for the centre console. The designo Alcantara windscreen frame, seat belts in silver or red and also five attractive paint finishes – including two matt paint finishes – round off the stylish appearance perfectly.

Other attractive optional appointments are also exclusively available for the SLK 55 AMG from the AMG Performance Studio:

• AMG multi-spoke light-alloy wheels, painted in titanium grey with a high-gloss finish, with 235/40 R 18 (front) and 255/35 R 18 (rear) tyres
• AMG multi-spoke light-alloy wheels, painted in matt black with a high-gloss finish on the rim flange, with 235/40 R 18 (front) and 255/35 R 18 (rear) tyres
• AMG Handling package (AMG Performance suspension, AMG rear axle differential lock, composite brake discs on the front axle, AMG Performance steering wheel with Alcantara inserts in the grip areas).
• AMG door sill panels, illuminated in white using LED technology
• AMG floor mats
• AMG Performance steering wheel with Alcantara inserts in the grip areas

For those with very special tastes: the SLK 55 AMG “Edition 1″
Similar to the C 63 AMG Coupé and CLS 63 AMG, a particularly appealing complete package is also available in the guise of the SLK 55 AMG “Edition 1″. This model variant features a whole host of specially designed high-quality exterior and interior details. There are three different paint finishes to choose from: designo magno cashmere white, diamond white BRIGHT metallic and obsidian black metallic. To add that perfect touch to the overall appearance there are also multi-spoke AMG light-alloy wheels painted in matt black with a high-gloss finish on the rim flange. To match the exterior design, the interior of the Edition 1 is available exclusively in two-tone “designo Exclusive leather” in platinum white pearl. The windscreen frame in Alcantara®, AMG carbon-fibre trim, the AMG Performance steering wheel with Alcantara inserts in the grip areas as well as white illuminated AMG door sill panels all help to create some attractive contrasts. Further visual highlights include platinum white contrasting stitching for the upper part of the dashboard, the door beltlines, the AMG Performance steering wheel and the shift lever gaiter.

Exceptional position: modern assistance systems on board
The SLK 55 AMG sets new standards when it comes to safety: a whole host of the latest assistance systems support the driver and have helped to secure the new AMG Roadster’s exceptional position in its segment. Standard equipment includes new, fibre-reinforced roll-over bar, two-stage driver and front passenger airbags, headbags, thorax airbags, seat belt tensioner with degressive belt force limiters, NECK-PRO crash-active head restraints, automatic child seat recognition, three-stage ESP and also ATTENTION ASSIST drowsiness detection.

Further assistance systems are available on request:

• DISTRONIC PLUS: this proximity control system automatically maintains a set distance from the vehicle ahead, braking the SLK 55 AMG to a standstill if necessary and also accelerating the Roadster again.
• The Intelligent Light System (ILS) provides five lighting functions (cornering light function, country mode, motorway mode, active light function and enhanced fog lamps), which are activated depending on the driving conditions
• Speed Limit Assist is able to detect speed limit signs using a camera on the inside of the windscreen, and indicate the detected speed limit in the instrument cluster or central display.
• The anticipatory and reversible PRE-SAFE occupant protection system is able to activate protective measures for the car’s passengers as a precaution. The aim is to prepare the occupants and the vehicle for an imminent collision so that the seat belts and airbags are able to fulfil their protective function to the full during an impact.
• The PRE-SAFE Brake detects the acute danger of a rear-end collision and prepares for autonomous braking. The system is active at speeds of between 30 and 200 km/h when moving vehicles are detected in front of the car.

Three generations: the SLK made by AMG
The new SLK 55 AMG is already the third generation of the exclusively dynamic Roadster model made by AMG. It all started in 2001 with the SLK 32 AMG. Its AMG V6 supercharged engine with a displacement of 3.2 litres produced 260 kW (354 hp) and maximum torque 450 Nm – as such, the SLK 32 AMG was the most powerful vehicle among the competition.

At the end of 2004 this was followed by the SLK 55 AMG. With its AMG 5.5-litre V8 engine, which developed 265 kW (360 hp) and 510 Nm of torque, it also assumed the leading position in its segment. No other vehicle in this class offers a large-displacement eight-cylinder engine – and Mercedes-AMG has remained consistently true to this philosophy with the successor model. The new SLK 55 AMG will celebrate its market launch in January 2012.

The following is a brief overview of pricing (all incl. 19% VAT):

• SLK 55 AMG: 72,590 euros
• SLK 55 AMG “Edition 1″: 85,520 euros with designo magno cashmere white paint: 89,447 euros
• AMG Handling package: 4,641 euros

Source: Daimler AG

Its new AMG 5.5-liter V8 engine featuring cylinder shutoff combines the ultimate in performance with the lowest possible fuel consumption. The world premiere of the all new SLK 55 AMG, will be at the Frankfurt Motor Show in mid-September.

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Pictures: Daimler AG

With a fuel consumption of 4.9 litres per 100 kilometres, it is the most economical roadster in its segment. Thanks to its enormous torque of 500 newton metres it accelerates from zero to 100 km/h in 6.7 seconds, and delivers a top figure for acceleration from 80 to 120 km/h. The result is superior driving enjoyment both on winding country roads and on long motorway stretches. Like the other models in the latest SLK family, which was presented in January this year, it combines lively sportiness with high-quality appointments and excellent comfort.

Diesel drive and roadster excitement do not go together – or so a common misconception would have it. Mercedes-Benz impressively demonstrates the contrary with the new SLK 250 CDI. Its four-cylinder diesel engine with a displacement of 2143 cc generates an output of 150 kW (204 hp) and 500 newton metres of torque – as much as a petrol engine with twice the displacement would normally generate. This makes the new SLK 250 CDI the most powerful diesel model in its class, and gives the roadster the potential for extremely sporty performance.

Equipped with the standard 7G-TRONIC PLUS automatic transmission (a six-speed manual transmission will follow in the second quarter of next year), the diesel SLK sprints from zero to 100km/h in 6.7 seconds and achieves a top speed of 243 km/h. Moreover, the flexibility of the SLK 250 CDI is nothing short of phenomenal. Thanks to its enormous diesel torque it accelerates from 80 to 120 km/h in just 4.3 seconds – easily the best figure in this class, making for safe and effortless overtaking.

Apart from this, the SLK 250 CDI is the most economical and therefore environmentally compatible roadster in its segment. It is happy with 4.9 litres of diesel fuel per 100 kilometres (NEDC combined consumption), which corresponds to CO2 emissions of 128 g/km. In other words, the diesel SLK combines thoroughbred sports car performance with the fuel economy of a sub-compact. This guarantees great driving pleasure with great fuel efficiency.

The diesel engine achieves its exemplary output, torque, fuel consumption and emissions figures, as well as its highly impressive smoothness for a diesel unit, thanks to an extensive package of innovative technologies. These include fourth-generation common-rail injection with a rail pressure of 2000 bar and precise injection timing, as well as two-stage turbocharging. Like all SLK models, the SLK 250 CDI also features a start/stop system as standard.

The frugal fuel consumption makes the SLK 250 CDI a car with superior long-distance qualities. Using the European motorways, it is e.g. quite possible to drive from the North Sea to a beach on the Mediterranean non-stop. Very comfortable sports seats, a comfortable suspension setup and the largest luggage capacity in this segment also do their bit to create the right conditions.

As it shares the same genes with the other members of the successful SLK family, the SLK 250 CDI combines lightfooted sportiness with stylish comfort, a striking sports car design and absolute day-to-day suitability, while delivering top performance with exemplary ecology. This means that the diesel version too provides open-top driving enjoyment at an extraordinarily high level.

The SLK 250 CDI is likewise available with a choice of three versions of the famous vario-roof – one of them the panoramic vario-roof with MAGIC SKY CONTROL. This glass roof can be changed from dark to transparent at the touch of a button. There are also three suspension versions available: a conventional steel suspension, a sports suspension with a stiffer spring and damper setup or a suspension with an electronically controlled, fully automatic damping system. The latter is part of the Dynamic Handling package, which also includes the Direct-Steer system and the Torque Vectoring Brake developed by Mercedes-Benz for particularly agile and predictable handling characteristics.

Externally the new SLK 250 CDI is no different in appearance from the petrol models. It even retains the twin exhaust system, and therefore has the same exciting look for which all the SLK models are known.
The new SLK 250 CDI can be ordered from 13 September 2011. The price including VAT is € 41,828.50.

Source: Daimler AG

Streetview enables locations all over the world to be seen in 360-degree perspective views and at street level. Panoramio allows access to millions of photographs which have been taken and uploaded by other users at locations all around the globe. Streetview and Panoramio thus provide comprehensive means of studying routes and checking out sights and destinations before embarking on a journey.

The COMAND Online multimedia system, available in the SLK, C-Class, E-Class, CLS and, from the autumn, in the new M-Class and the new B-Class, now offers internet access for the first time. Customers can either surf the web as they wish while the car is stationary or call up a Mercedes-Benz app whose particularly fast page loading and simple operation make it suitable for use while driving.

All customers will be able to use the new apps. Additional apps which have already been introduced are Google™ Local Search and Weather and the facility for downloading a route which has previously been configured on a PC using Google Maps and transmitted to the car. Mercedes-Benz is successively extending the range of apps. An overview specifying the telephones on which the COMAND Online apps can be used is available at the website www.mercedes-benz.com/connect.

A host of user-friendly functions: the COMAND Online multimedia system
The high-resolution colour display has a diagonal of 17.8 cm. Photos can be shown on the large screen and turned over manually, as in a slide show. Where the audio equipment is concerned, too, new types of representation bring a fresh look and more convenient operation. The new Cover Flow function, for instance, sorts the title images of the music albums stored in a carousel-like form, so that the Mercedes driver can easily leaf through their music collection – even if it is rather on the large side: the memory for compressed audio files (mp3, wma and aac formats) is now 10 GB in size. As an option, COMAND Online is available with a 6-disc DVD changer.

Greatest convenience is afforded by the Music Search function, which enables drivers and passengers to search the hard disc, SD memory cards, USB sticks, CDs and DVDs for specific music tracks and artists. The search can be according to various criteria, for instance album, music category or composer. If a name needs to be entered, the software will also tolerate spelling mistakes. The driver is therefore able to devote their full attention to the traffic. As a further advantage, the occupants are able to search all the connected media and devices simultaneously.

The fast hard-disc navigation system of COMAND Online also has added functions. New features include a 3D display with three-dimensional city views. Also new: routes covered can be recorded and repeated later, specific personal destinations can be imported via an SD card and four alternative routes can be displayed on the navigation map, one of them a particularly economical variation. Mercedes-Benz customers in Europe receive the current cards for their COMAND Online multimedia system free of charge for three years. Authorised Mercedes-Benz dealers upload the updates for navigation data in 39 European countries into the navigation system when the customer visits their premises.

In Europe, COMAND Online also comprises Speed Limit Assist, which receives its information for traffic sign recognition via a camera and navigation database. COMAND Online also includes the LINGUATRONIC voice-operated control system for audio, telephone and navigation. The new “One Shot” input function for the navigation system is particularly convenient, whereby the place and road can be spoken directly after one another. This function is currently available in seven languages and significantly enhances ease of operation.

Source: Daimler AG

The new Roadster from Mercedes-Benz was voted as the overall winner of the automotive beauty contest by around 90,000 readers of the popular specialist magazine. As a result, the SLK can now proudly carry the title of “Germany’s most beautiful car”.

The new roadster uncompromisingly takes driving pleasure and open-air enjoyment to a new level. It blends light-footed sportiness with stylish comfort, a striking sports-car design with total suitability for everyday use, top performance with exemplary ecology. What’s more, the SLK is proud to present the world premiere of the panoramic vario-roof with MAGIC SKY CONTROL, which switches to light or dark at the touch of a button. Exemplary efficiency and sporty flair come courtesy of powerful new 4- and 6-cylinder engines featuring the standard-specification ECO start/stop function. With their superb levels of performance they are up to 25 percent more economical than their predecessors. And a unique set of safety equipment bestows role-model status on the SLK in this segment. With its wealth of technical innovations the SLK is once again the benchmark in its class.

Source: Mercedes GP

“We have been making rapid advances in efficiency, the likes of which have never been seen before in the history of the automobile. And as the inventors of the automobile, we assume particular responsibility for its future,” explains Professor Herbert Kohler, Chief Environmental Officer of Daimler AG. “We analyse the environmental compatibility of our models throughout their entire life cycle – from production, through their many years of usage, to end-of-life recycling. This goes far beyond mere compliance with legal requirements.”

The Environmental Certificate, together with explanatory material, has been made available to the public in the “Life Cycle” documentation series, which can be accessed at www.mercedes-benz.com. In addition to the SLK, the A, B, C, E and S-Class models, as well as the GLK and SLK have already received environmental certification from TÜV Süd.

Over its entire life cycle – from production and operation over more than 200,000 kilometres up to recovery – the new Mercedes-Benz SLK causes 20 percent lower CO2 emissions than its predecessor at the time of discontinuation in 2010. The overall energy balance is equally positive: over the entire life cycle, the primary energy savings amount to 18 percent compared with the predecessor, which corresponds to the energy content of 4100 litres of petrol.

This is largely due to significant reductions in consumption. In the SLK 200 BlueEFFICIENCY model, for example, consumption has dropped from the preceding figure of 8.0 to 8.2 l/100 km (at the time of discontinuation in 2010) to 6.1 to 6.5 l/100 km, representing a reduction in fuel consumption of up to 24 percent.

The SLK already meets the mandatory recycling rate of 95 percent by weight that will come into force on 1 January 2015; the future requirements of vehicle recycling were already taken into account at the development stage. Closing material loops plays an important role here. The new Roadster makes use of a total of 68 components with a combined weight of 35.4 kg that are produced from high-quality recycled plastics. The mass of approved recycled components has therefore been increased by 5 percent over the previous model.

Some 24 components in the SLK with a total weight of almost 8.2 kg are made from natural materials – an increase of 67 percent compared with the previous model. In terms of natural fibres, the new SLK primarily makes use of leather, cotton and wool as standard. For the tank vent filter too, the new SLK also makes use of raw materials from nature, olive stones are employed in the production of the activated charcoal filter.

Source: Daimler AG

Obviously, it was a question of honour for the PIECHA Design specialists to develop as one of the first ones an entire styling and tuning programme for the new SLK R172. And thus, they present the “Accurian RS”, a sporty, elegant interpretation of the Stuttgart-based roadster. Piecha gives the new, more defined front of the SLK an Accurian RS front spoiler lip with lateral grids.

The lip can be combined with a cover, which turns the grid into a three-part piece and further emphasises the LED daytime running lights on the right and left side. For a quieter airflow around the lateral body of the new SLK, PIECHA Design installed a set of Accurian RS side skirt covers. The covers are bonded easily and positively on the original side skirts. Furthermore, the opposed installed grids provide for a more prominent design. For all R172 models, no matter whether with the side skirts, the AMG or also the Accurian RS sills, PIECHA Design offers per side four LED recessed spotlights each.

The rear end has a considerable sportier appearance thanks to the Accurian RS rear diffuser, which is available in a small and large version. The diffusor, which runs up to the subfloor, not only provides for additional output at the rear axle, but also frames the QUADRO 4-tube mufflers in perfection. In both versions, the serial rear apron has to be slightly reworked.

Moreover, a diffusor application is available for the AMG styling rear apron. The Accurian RS aerodynamic programme is completed by a classical rear spoiler lip, which has a simple adhesive fixation. Another world premiere are the PIECHA MP1 monobloc high-tech rims, which perfectly match the modern and sporty, elegant design language of the Accurian RS with its newly interpreted turbine design.

In the front in 8.5×19 ET25 with 225/35 R19 and in the back in optional 9.5 or 10.5×19 with 255 or 275/30 R19, the MP1 monobloc wheel provides in connection with 25 mm lowering springs for a perfect wedge shape.

Finally, the Mercedes specialists from Rottweiler offer practical comfort top control, which allows for an opening and closing of the top via the serial key up to a speed of 60 km/h.

Source: Piecha Design

Suggested retail pricing for the 2012 SLK350 will start at $54,800, while the 2012 CLS550 will begin at $71,300 and the high-performance CLS63 AMG at $94,900. Prices exclude a $875 destination & delivery charge.

SLK Features Trend-setting Retractable Hardtop

The 2012 Mercedes-Benz SLK coupe/roadster represents the third generation of a two-seat sports car that rocked the automotive world when it unveiled the first automatic retractable hardtop in modern times. With the top up it’s a quiet, weather-tight coupe – push a button, and 20 seconds later the car is topless. Like the retractable hardtop of the larger SL model, the rear window of the SLK pivots to match the curvature of the top as it’s being lowered, providing more trunk room than ever.

The SLK350 is powered by a new 3.5-liter V6 that features direct injection and multi-spark ignition. With even more power and better fuel economy than its predecessor, the new SLK engine generates 302 horsepower and 273 lb.-ft. of torque.

CLS Four-Door Coupe Gets First Major Redesign

The four-passenger 2012 CLS coupe represents the first major redesign of a car that established an entirely new market segment – the four-door coupe, which combines the emotional appeal and dynamic design of a coupe with the comfort and functionality of a sedan. When it hits the U.S. market in the summer of 2011, the 2012 CLS line will offer a choice of two exciting models, both powered by new biturbo, direct-injection V8 engines. The 4.6-liter CLS550 engine produces 402 horsepower and 443 lb-ft. of torque, and the high-performance CLS63 AMG is powered by a 5.5-liter version of the new V8 that’s rated at 518 hp and 516 lb.-ft of torque.

Source: Daimler AG

Strictly speaking, however, the pedigree of the SLK stretches back even further – to the 190 SL, a vehicle which automotive enthusiasts were already dreaming about in 1955 as the economic upturn was starting in the Federal Republic of Germany. When the SLK appeared as a series-produced car in 1996, it not only caused a stir on the road but also established a new market segment which has since grown by leaps and bounds. With the steel vario-roof, which transforms the roadster into an all-weather coupé within a matter of seconds, the roadster has been and still is the role model for many open-top cars. The success of the SLK has exceeded all expectations: to date, well over half a million owners have been delighted with their purchase of an SLK Roadster.

The 190 SL – a new star in the automotive firmament in 1955
With the SLK, Mercedes-Benz continued its roadster tradition which stretches back a long way. Its direct ancestor is considered to be the 190 SL, which owes its existence primarily to the perseverance of Maximilian Edwin Hoffman. The enterprising American with Austrian roots was importing European cars into the USA as early as 1946, and in doing so demonstrated infallible instinct and tremendous flair. In 1953 he urged the executive board of Daimler-Benz to build a more affordable sports car, in addition to the 300 SL, for the American market. As an elegant sports car from a well-known company featuring an exciting design at a low price, the 190 SL was designed to charm the Americans.

After a development period of just five months, on 6 February 1954 the 190 SL celebrated its world premiere in New York, alongside the legendary 300 SL “gullwing”.

Unlike the 300 SL, the 190 SL was not designed as a thoroughbred sports car but rather as a sporty, elegant two-seater touring and utility vehicle. Its chassis was the shortened frame floor assembly from the 180, combined with the single-joint swing axle with lowered centre of rotation, as used in the 220. The front-wheel suspension, including subframe design, came from the 180 / 180 D models. The 190 SL was driven by a newly developed four-cylinder engine with a displacement of 1.9 litres, overhead camshaft and output of 105 hp. Depending on conditions it could therefore reach a speed significantly exceeding 170 km/h, and accelerated from 0 to 100 km/h in 14 seconds.

Series production started in May 1955. The 190 SL was available as a roadster with soft top as well as a coupé with removable hard top, with or without a soft top as an option. A broad range of prominent social figures chose this elegant sports car to complement their image, including Grace Kelly and Frank Sinatra, who drove a 190 SL in the film “Ten Thousand Bedrooms”.

The Mercedes-Benz 190 SL was built up until 1963. The clearest indication of just how much loved and successful the 190 SL was is demonstrated by the production figures: between May 1955 and February 1963, no less than 25,881 cars left the assembly lines in Sindelfingen – far in excess of the initial aspirations.

Two studies for the new type of roadster
Against this historical backdrop, it seemed only logical some decades later to revisit these considerations: would it not perhaps be appropriate for the SL-Class Mercedes-Benz models, now firmly established in their own right, to be joined by a younger brother? After all, Mercedes-Benz had launched an entirely new product initiative, to which a compact roadster could lend fresh emphasis by drawing attention to the sporting heart of the Mercedes-Benz brand.

An appropriate acronym for this newcomer was swiftly coined: SLK. In German, these three letters stand for the car’s characteristic properties – sporty, lightweight and short – and, given the great sporting successes of Mercedes-Benz back in the 1920′s and 1930′s, they have an almost mystical resonance.

In Turin in April 1994, roadster enthusiasts were able to gain a first glimpse of how Mercedes-Benz believed a compact roadster should look. A brilliant silver showstopper with a distinct aura of spartan sportiness sent the trade professionals into raptures. Bruno Sacco, Head of Design for the brand at the time, made it clear what the company’s aim was: “We are exhibiting a forward-looking roadster study which delivers a unique synthesis of purist motoring pleasure with all the safety features for which Mercedes cars are renowned”.
To meet these requirements, some formal individuality was called for. The SLK study reflected this thanks to its compact dimensions and some evident highlights. Short overhangs at the front and rear, as well as a distinctive wedge shape, embodied the enjoyment to be had from a hands-on driving experience. And the two “power domes” on the bonnet, running parallel to the direction of travel, were acknowledgement of the originator of all SL’s dating from the 1950s. The SLK study revealed a lot of gleaming metal. Only 20 percent of the interior was covered, and the high-tech cockpit was dominated by bold shapes and high-quality materials.

To find out just how seriously the people in charge at Mercedes-Benz were taking this SLK project in its earliest days, one needs to look no further than the Paris Motor Show held in September of the same year. Here the company unveiled its second study, this time with a vario-roof and in the form of a customised version in blue, with blue-tone leather and a range of additional luxury accessories such as automatic transmission, air-conditioning system, power windows, a hi-fi sound system and much more besides. This enabled Mercedes-Benz to demonstrate convincingly the breadth of appeal and the potential inherent in a compact roadster.

The SLK sets the trend before going into series production
Then the automotive enthusiasts started to wait. Many viewed the SLK as a very auspicious prospect indeed. Mercedes-Benz had done the unexpected and demonstrated that a small and relatively inexpensive roadster was capable of offering a great deal of motoring pleasure while still being an absolutely serious and down-to-earth car in terms of safety and quality. This meant that the roadster studies had already opened up a new market niche, making the SLK a trendsetter even before series production had begun.

By 1996 everything was in place: the series production version of the new SLK, designated internally as the R 170, was launched at the Turin Motor Show. Especially high levels of interest were shown in the fully-lowering steel vario-roof, which substantively backed up the SLK claim to being a car for all weathers. Using an intelligent electro-hydraulic system, the entire roof folded down into the boot in just 25 seconds, leaving the owner free to roam under an open sky.

The SLK also fielded a convincing range of other qualities. Take safety for example: two fixed roll-over bars behind the seats protected occupants from injury if the car should overturn and, in conjunction with the exceptionally robust A-pillars, delivered a very high level of safety even when these Mercedes-Benz cars are driven with the top down.

Engines from 136 to 354 hp
The sporting talent of the SLK was unleashed by two engine variants: a 2 litre four-cylinder engine with a power rating of 100 kW (136 hp) and a supercharged 2.3 litre engine, also a four-cylinder unit, delivering 142 kW (193 hp). In early 2000, the two litre engine was also fitted with a belt-driven supercharger, boosting power to the rear axle to a new level of 120 kW (163 hp). The choice of engines was broadened by the arrival of two six-cylinder models, the 160 kW (218 hp) unit for the SLK 320 and the 260 kW (354 hp) powerplant in the SLK 32 AMG.

The evolution of the SLK continues
In February 2000, Mercedes-Benz substantially upgraded the level of equipment for its roadster and incorporated innovations such as the Electronic Stability Program (ESP) and a six-speed manual transmission into its standard equipment package. In visual terms, a new bumper and side skirts gave the car an even more dynamic appearance. All the attachments and door handles were painted to match the vehicle body, to enable the whole car to present an image of a unified whole in terms of both colour and form. New tail lights, stainless steel trim on the exhaust tailpipe and a painted radiator grille gave the SLK design an even more commanding identity.

Even more driving pleasure with the second generation SLK
In the spring of 2004, the second generation of the SLK (internal model series designation: R 171) was launched – offering more sportiness and dynamism, and even more driving pleasure. Thanks to powerful engines, a newly developed chassis, direct steering and a precise six-speed shift mechanism, the second generation of the SLK provided an even more responsive driving experience. As a world first, Mercedes-Benz introduced the AIRSCARF neck-level heating system. At the touch of a button, it generates warm air which flows from the head restraints. This now meant that drivers of the SLK were able to enjoy open-top driving and the open-air roadster experience all year round, even when outside temperatures dropped. The operating mechanism for the vario-roof was modified. The rear window now rotated in its frame, so that its concave side was uppermost when the roof was folded. This enabled the luggage capacity to be increased.

True to the principle of ongoing development, in 2008 the SLK underwent
a comprehensive facelift. The most significant visual changes included redesigned front and rear sections and also a carefully modified interior with new instrument cluster and three-spoke sports steering wheel. The distinctive dynamic character of the two-seater was brought to the fore to particularly good effect in the SLK 350 courtesy of a high-revving V6 sports engine producing 224 kW (305 hp) along with an optional Direct-Steer system. In addition, despite their significantly increased performance, all of the engines were more economical in terms of fuel consumption.

The new SLK once again sets standards
The new SLK which will be presented in January 2011, and designated internally as the R 172, will follow in these same footsteps. Partly thanks to new engines with the ECO start/stop function, the roadster consumes significantly less fuel, thus demonstrating that achieving pure driving pleasure while maintaining a clear conscience when it comes to the environment do not necessarily have to be conflicting principles. The new SLK combines nimble-footed sportiness with stylish comfort, a striking sports car design with absolute suitability for everyday use, and top-of-the-range performance with exemplary ecology. In addition, a unique series of safety equipment enables the SLK to assume the role of benchmark in this segment. Standard equipment also includes the ATTENTION ASSIST drowsiness detection system.

Mercedes-Benz will also be the world’s first automotive manufacturer to offer the panoramic vario-roof with MAGIC SKY CONTROL as an optional extra. With this innovation, the transparent glass roof can be darkened in a matter of seconds at the touch of a button. Other options include a Dynamic Handling package with continuously variable damping incl. Direct-Steer and the Torque Vectoring Brake, or the Intelligent Light System with various lighting functions. Thanks to such a rich array of technical innovations, the SLK will once more set the standard in its class.

Model history: the Mercedes-Benz SLK
1994
- In April, Mercedes-Benz displays the compact roadster as a study vehicle at the Turin Motor Show
- In September a second study vehicle is unveiled, this time with vario-roof and in the form of a customised version

1996
World premiere of the SLK at the Turin Motor Show

2000
The SLK undergoes a comprehensive facelift

2004
World premiere of the second generation of the SLK at the Geneva Motor Show

2008
Facelift for the second generation of the SLK

2011
Third generation of the SLK

Source: Daimler AG

The AMG Bodystyling package adds a further sporty and businesslike touch. This includes a muscular front apron, prominent side skirts and a new rear apron that suggests sheer power. Headlamps with dark surrounds and dark-tinted tail lights provide further visual distinctions.

The seats with their specific vertical fluting and red topstitching emphasise their sporty nature, and are also available in grey as an alternative. There is also red topstitching on the door armrests (if an Exclusive nappa leather interior is specified, also on the centre armrest, the upper dashboard section and the beltlines), the leather gaiter on the shift/selector lever and the steering wheel with its grippy, perforated leather. Red seat belts provide yet another visual highlight. In models with the 7G-TRONIC PLUS automatic transmission, steering wheel shift paddles facilitate sporty gearshifts. An instrument cluster in a “chequered flag” design, black velour floor mats with red piping and the AMG logo round off the exclusive interior.

The technical basis for models with the AMG Sports package is provided by a lowered sports suspension with a stiffer, sportier spring and damper setup. Contact with the road surface is established by 18-inch 5-twin-spoke high-sheen light-alloy wheels with mixed-size tyres (front 225/40, rear 245/35) from sports car specialist AMG. A braking system with perforated 17-inch brake discs and callipers bearing the lettering “Mercedes-Benz” ensures outstanding deceleration. The four-cylinder roadsters equipped with the AMG Sports package also express their special character acoustically – with an even sportier engine sound.

Source: Daimler AG

The top-of-the-range COMAND Online is even internet-capable, and enables the driver to enjoy the benefits of the World Wide Web in the car. The high performance of the head units available is immediately apparent from the large colour display. This monitor is positioned in the upper section of the centre console, so that the driver is able to see the information provided without taking his eyes fully off the road. It can also be easily viewed by the passenger.

All the head units also share a common control unit known as the “controller”. In the interests of relaxed and ergonomical operation, it is located within easy reach in front of the centre armrest. This extremely sophisticated, metal rotary/pressure control can be moved in eight directions, and can also activate or confirm additional functions by rotating or pressing it. Navigating through the main menus and sub-menus is effortless and easy, and thanks to new, user-friendly logic the system is quickly and intuitively mastered.

Head units available for the new SLK

• Audio 20 CD,
• COMAND Online.

The head units are connected to eight loudspeakers and feature speed-sensitive volume control from 20 km/h, which increases the radio volume with the vehicle speed. All the units are also protected against theft by electronic assignment to the specific vehicle.

Audio 20 CD
The basic Audio 20 CD radio is combined with a large TFT colour display with a screen diagonal of 14.7 centimetres and a resolution of 400 x 240 pixels as a head unit. Audio 20 features

• integrated FM twin tuner,
• audio amplifier with 4×25 watts,
• MP3-capable CD player or optionally a 6-disc CD changer and AUX connection in the glove compartment, as well as
• a Bluetooth interface for hands-free telephoning.

Available for the first time, the Becker MAP PILOT upgrades the basic Audio 20 radio into a fully-fledged navigation unit. The additional unit contains the GPS receiver and the processor required for navigation. The colour map and additional information are shown on the colour display of the Audio 20 head unit, and the Becker MAP PILOT’s acoustic driving recommendations are issued via the onboard loudspeakers. The driver is also able to have a direction arrow and distance information shown in the multifunction display of the instrument cluster. The navigation has a clearly laid-out user interface and can be operated intuitively using the central controller in front of the centre armrest. Data covering Europe are pre-installed in the Becker MAP PILOT. It offers the latest navigation technology, and includes the following features:

• map-based navigation including 3D view,
• lane recommendation,
• display of speed limits for many roads, as well as other traffic information,
• information on the remaining distance, ETA or street names,
• address input possible with a single voice command,
• calculation of the most economical route (fuel savings through an ideal compromise between travel time and fuel consumption),
• display of alternative routes,
• TMC for dynamic tailback avoidance,
• display of brand logos to mark special destinations such as filling stations or restaurants,
• map and functional software updates plus other features and services available via the internet, and additional map updates available from dealers on SD memory cards.

The Becker MAP PILOT is fitted into the glove compartment, and can be easily removed at any time. Updating the map material via a PC and the internet therefore presents no problems. It is also possible to order a pre-installation kit for the Becker MAP PILOT ex factory, without the unit itself.

COMAND Online – onboard internet access
On request Mercedes-Benz will equip the new SLK with a COMAND Online head unit using the voice-operated control system LINGUATRONIC. The control and information interface for this unit is a high-resolution TFT colour display with a 17.8 cm screen diagonal capable of representing 800 x 480 pixels.

The COMAND Online multimedia system offers internet access for the first time. Customers can either surf freely on the internet when at a standstill or to a Mercedes-Benz online service while driving; the latter’s pages can be called up particularly quickly and it is simple to operate. The integral services planned include Google™ Local Search and further online services from other suppliers such as the weather. It is also possible to send individual destinations and routes to the vehicle via Google Maps. More Mercedes-Benz online services will be introduced gradually and then all customers will be able to use them.

The high-resolution colour display measures 17.8 cm. Photos can be shown on the large screen and turned over manually, as in a slide show. Where the audio equipment is concerned, too, new types of representation bring a fresh look and more convenient operation. The new Cover Flow function, for instance, sorts the title images of the music albums stored in a carousel-like form, so that the SLK driver can easily leaf through their music collection – even if it is rather on the large side: the memory for compressed audio files (mp3, wma and aac formats) now comprises as much as 10 GB. As an option COMAND Online is available with a 6-disc DVD changer.

Greatest convenience is afforded by the Music Search function, which enables drivers and passengers to search the hard disc, SD memory cards, USB sticks, CDs and DVDs for specific music tracks and artists. The search can be according to various criteria, for instance album, music category or composer. If a name needs to be entered, the software will also tolerate spelling mistakes. The driver is therefore able to devote their full attention to the traffic. As a further advantage, the occupants are able to search all the connected media and devices simultaneously.

The fast hard-disc navigation system of COMAND Online also has added functions. New features include a 3D display with plastic city views. Also new: routes covered can be recorded and repeated later, specific personal destinations can be imported via an SD card and four alternative routes can be displayed on the navigation map, one of them a particularly economical variation. Mercedes-Benz customers in Europe receive the current maps for their COMAND Online multimedia system free of charge for three years. The authorised Mercedes-Benz dealers upload the updates for navigation data in 39 European countries into the navigation system when the customer visits their premises.

In Europe COMAND Online also comprises the Speed Limit Assist, which receives its information for traffic sign recognition via a camera and navigation database. COMAND Online also includes the LINGUATRONIC voice-operated control system for audio, telephone and navigation. The new “One Shot” input for the navigation is particularly convenient, whereby the place and road can be said directly after one another.

COMAND Online is also equipped with the following features:

• internet browser,
• FM radio twin tuner with additional RDS/TMC tuner for traffic information,
• audio signal amplifier 4 x 25 W,
• DVD player for audio and video (optionally also with 6-disc DVD changer),
• integrated navigation system with map display (including birdview, 3D map and 3D landmarks),
• integrated hard disc for navigation data and additional functions (e.g. music server); this means that the DVD player is available to play music during a journey,
• SD card slot.

The voice-operated control system LINGUATRONIC enables all town and street names to be input into the navigation system by voice command. The audio systems can also be voice-controlled, and the global address book accessed. LINGUATRONIC recognises commands without prior training, and these can be entered by any speaker. The system prompts the user to repeat the process if it detects an error or fails to recognise a command. Naturally the COMAND Online system can also be combined with the convenience telephony function.

Sound system – striking the right note
Customers who attach importance to a quality of sound approaching concert-hall standards in the SLK are able to choose the optional Harman/Kardon surround sound system for either Audio 20 CD or COMAND Online. This features an additional MOST amplifier with DSP and an output of 10 x 50 watts plus eleven high-quality, high-performance loudspeakers. All the amplifier channels of the sound system are equipped with frequency compensation individually suited to the vehicle acoustics. Bass, treble, volume, balance and fader can be individually adjusted.

Aerials – first-class reception
The radio reception aerials are integrated into the windscreen, with their aerial amplifiers in the A-pillar area. A so-called phase diversity function obtains the maximum reception strength from both aerial signals. To this end it mainly reduces interference caused by multi-channel reception (interference due to reflections). The maximum specifications include:

• two FM aerials in the windscreen for the diversity functionality,
• an AM aerial in the rear window or parcel shelf/roof compartment cover,
• an aerial for the telephone/GPS and DAB L-band (digital radio)

Telephony – reachable at any time
Both the Audio 20 CD radio and the COMAND Online system have an integrated hands-free system for mobile phones using a Bluetooth interface. Even in the basic telephony version, the hands-free system can be operated via the multifunction steering wheel and the keys on the head unit. Bluetooth can also be used to transfer contact data from a mobile phone to the head unit. SMS messages can also be downloaded if the mobile phone supports MAP (Message Access Profile).

A convenience telephony function is also available as an optional extra, and this can likewise be combined with all available head units. It consists of a phone cradle for the centre console with a phone charging function, and uses the vehicle aerial via a serial interface. A cradle suitable for the relevant phone model is separately available as a Mercedes-Benz accessory.

Source: Daimler AG

Far from contenting themselves with achieving rating targets, they work intensively on attaining a level of safety which far exceeds the standards stipulated by the world’s legislators. The most important measure of their work is not the laboratory or crash test facility, but actual, real-life accidents. They call the results of their work Real Life Safety, a concept which is based on research into thousands of accidents. Using this irrefutable evidence, the Mercedes-Benz engineers have developed or initiated most of the assistance systems which today effectively support drivers and have been adopted by many of the company’s competitors.

ATTENTION ASSIST and ADAPTIVE BRAKE as standard
The new SLK also features a unique combination of driver assistance systems which help to avoid accidents. These include the drowsiness detection system ATTENTION ASSIST, for example. Thanks to this system, the roadster develops a precise feeling for the level of attentiveness of the driver and can provide an early warning of overtiredness.

Also making up part of the standard equipment specification is the ADAPTIVE BRAKE. It comprises ABS, the acceleration skid control system ASR and also active yaw control (GMR). In addition, it features the following functions:

• it supports the driver when moving off uphill, by preventing the vehicle from unintentionally rolling back;
• it also keeps the vehicle stationary without having to keep the brakes applied continuously – for example when waiting at traffic lights
  (HOLD function);
• as soon as the driver abruptly steps off the accelerator, it brings the brake pads into light contact with the brake discs as a precautionary measure, so that the necessary braking pressure can be attained quicker in the possible event of emergency braking;
• in wet conditions it applies light brake contact, without the driver even noticing, to dry the brake discs.

The ADAPTIVE BRAKE works in conjunction with the equally adaptive brake light. In emergency braking situations, it warns vehicles behind with flashing brake lights.

Emergency braking on detecting an acute risk of a front-end collision
Available as optional extras are the DISTRONIC PLUS proximity control as well as the PRE-SAFE Brake, already tried and tested in other Mercedes-Benz models. Both systems work in conjunction and can initiate emergency braking automatically on detecting an acute risk of an accident.

In normal driving conditions, the radar-based DISTRONIC PLUS proximity control adjusts the distance to the vehicle in front automatically. If necessary, it can apply the brakes, even bringing the SLK Roadster to a stop, and accelerate it again. This takes some of the strain off the driver, particularly in bumper-to-bumper driving conditions. If the distance starts to narrow too quickly, the system gives the driver visual and audible warnings, thereby prompting the driver to take action, at which point he is also supported by Brake Assist PLUS (BAS PLUS).

If the systems detect the acute danger of a rear-end collision and the driver fails to respond to visual and acoustic warnings, the electronics activate the PRE-SAFE Brake in preparation for autonomous braking. This happens in two stages:

• Around 1.6 seconds before the calculated impact point the system decelerates the car with around 40 percent (approx. four m/s²) of the maximum braking power, gives the driver an additional, haptic warning of the impending impact and as a precaution activates the reversible PRE-SAFE occupant protection system.
• If the driver still fails to react, the PRE-SAFE Brake activates the maximum braking power around 0.6 seconds before the now unavoidable collision – this emergency braking can greatly reduce the severity of the impact. The system therefore acts like an “electronic crumple zone”, offering the car occupants even greater protection.
• The PRE-SAFE Brake is active at speeds of between 30 and 200 km/h when moving vehicles are detected in front of the car. The system also reacts if the car approaches a stationary queue of traffic, providing its speed is below 70 km/h.

Safety and comfort
Those wishing to do so can extend the range of assistance systems in the new SLK even further with the addition of features enhancing both safety and comfort:

• The Intelligent Light System provides five lighting functions (cornering light function, country mode, motorway mode, active light function and enhanced fog lamps), which are activated depending on the driving conditions
• Speed Limit Assist is able to detect speed limit signs using a camera on the inside of the windscreen, and indicate the detected speed limit in the instrument cluster or central display.
• The optional PARKTRONIC incl. Parking Guidance supports the driver when parking. Its ultrasonic sensors measure the length of parking spaces as the car drives past; the cockpit display then provides a schematic representation of the recommended parking manoeuvre.

Only available from Mercedes-Benz – the anticipatory occupant protection system PRE-SAFE
An additional safety highlight available in the new SLK is the anticipatory occupant protection system PRE-SAFE, a system developed by Mercedes-Benz which is unique throughout the world. If the system detects an acute risk of an accident, it reflexively activates precautionary protective measures for the vehicle occupants, so that the seat belts and airbags are able to fulfil their protective function to the full during an impact. Mercedes-Benz developed PRE-SAFE on the basis of research into actual accidents, and is the only manufacturer in the world to offer such a system. This highly effective system, however, has so far not been taken into account when producing ratings.

In the new SLK, additional post-crash measures supplement the PRE-SAFE system to enable prompt assistance after an accident has occurred: depending on the damage, the interior lighting can be switched on automatically, the side windows can be opened by 50 mm to provide better ventilation in the interior, and in vehicles with the Memory package the steering wheel can be moved upwards.

Taking into account all of the requirements of the rating institutes
In developing the new SLK, the requirements of Euro NCAP as well as all of the global consumer ratings have been taken into account. This has contributed to the development of the bodyshell structure of the vehicle, which follows established concepts and has been optimised in a number of detailed areas. These include, among other things, reinforced members, a new side impact structure and new fibre-reinforced roll-over bar.
In the event of an accident, up-front sensors and lateral satellite and roll-over sensors help the central control unit to predict the nature and severity of the accident. New, additional pressure sensors in the doors as well as acceleration sensors in the front bumper help in detecting an impact with a pedestrian.

New headbag and crash-responsive head restraints
The restraint systems with two-stage driver and front passenger airbags have also been enhanced. A new feature is the headbag, which provides generous lateral protection for the head impact area. An additional thorax airbag in the seat backrest protects the upper body in the event of a side impact. The seat belts, with belt buckle tensioners and speed-sensitive belt force limiters, serve to highlight the high safety standards of Mercedes-Benz.

Another new feature finding its way into the standard equipment of the forthcoming SLK comes in the form of the NECK-PRO crash-responsive head restraints, developed by Mercedes-Benz. They support the driver’s and front passenger’s head in the event of a rear impact and reduce the risk of whiplash. Also fitted as standard is automatic child seat recognition.

Protection for pedestrians
The new SLK Roadster uses the latest technology in the area of pedestrian protection too. A sensor system is able to register an impact with a pedestrian and can ensure that the bonnet is immediately raised by 85 mm. This creates additional space between the bonnet and the components in the engine compartment. This in turn results in comparatively lower acceleration values for the head of the pedestrian during the impact, thus reducing the overall risk of injury.

As a result, the new SLK provides its occupants not only with a superior level of safety in all areas – something which is unique in this segment – but also enhanced safety for other road users too.

Source: Daimler AG

• A conventional steel suspension comes as standard
• A lowered sports suspension with harder springs and dampers ensures a systematically sporty driving experience
• As an alternative a Dynamic Handling package is available. Its merits include a suspension with continuous adjustable damping. It has an electronically controlled fully automatic damping system, so the vehicle rolls away gently even on poor road surfaces, but still offers high driving dynamics

Also included in the Dynamic Handling package are a Direct-Steer system and the Torque Vectoring Brake developed by Mercedes-Benz. Wheel location is the same for all three suspension variants: a 3-link suspension locates the wheels at the front, while at the rear this is done by a multi-link independent suspension which has already impressively demonstrated its unrivalled wheel location qualities in the preceding model. In the new SLK this has forged aluminium hub carriers, in order to reduce unsprung masses even further in the interests of even better roadholding. All models in the new SLK-Class also have a torsion bar stabiliser, which is attached directly to the body.

The standard suspension is a conventional steel suspension with wheel-locating front axle spring struts, a torsion bar, twin-tube shock absorbers at the front and single-tube shock absorbers with rear axle springs at the rear.

The optional sports suspension has a stiffer damper setup, shorter suspension springs and torsion bar stabilisers with a larger cross-section. The suspension is also lowered by ten millimetres. The roll control system has been reinforced to achieve even smaller roll angles when cornering at speed.

Suspension with automatic, continuously adjustable damping
The suspension with automatic, continuously adjustable damping, which is included in the Dynamic Handling package, sets new standards. It allows sporty and agile handling for maximum driving pleasure on winding country roads, but also cossets the occupants with excellent road roar and tyre vibration characteristics and a high level of stability on poorer road surfaces. An electronic system automatically and continuously ensures that the dampers are always set to suit the driving situation. The response time is normally only around 10 milliseconds.

Setting the basic characteristics of the suspension is still left to the driver, however, using a switch that enables him to choose comfortable or sporty damping characteristics. At the touch of a button he therefore has a suspension setup available which offers the same comfort as the standard suspension. If he chooses the sport setting, he is opting for a driving experience with a very high level of dynamic response.

Like the sports suspension, the suspension with variable damping is equipped with torsion bars with a larger cross-section, and the suspension is lowered by ten millimetres.

Brakes for sporty driving enjoyment
The well-proven, dual-circuit hydraulic braking system and the distribution of the two circuits to the front and rear axles has been adopted from the preceding model. All variants are equipped with single-piston floating calliper brakes all-round. In the entry-level SLK 200 BlueEFFICIENCY the calliper housings are of aluminium, while the more powerful engine variants use housings of composite aluminium at the front and aluminium at the rear.

The brake covers at the front axle were optimised in the wind tunnel for even more efficient cooling of the brakes and wheel bearings, and to protect the brake discs from road spray.

Brake disc dimensions

Torque Vectoring Brake: ESP helps with the steering
The Dynamic Handling package includes the Torque Vectoring Brake system. This ensures an additional safety margin at the physical limits, makes the SLK even more agile and therefore enhances the sportiness of the roadster. The system achieves this with targeted, one-sided braking intervention by the Electronic Stability Program ESP at the inside rear wheel when cornering. If ESP detects a tendency to understeer, the Torque Vectoring Brake generates a defined turning or yawing moment around the vehicle’s vertical axis within fractions of a second. Thanks to the different torque distribution that results, the SLK turns into the bend under precise control without any loss of handling dynamics. The advantage of this solution over complex mechanical components such as an active steering rear axle, additional multi-disc clutches or an active differential: the Torque Vectoring Brake can be implemented without an increase in vehicle weight and therefore no disadvantages in terms of fuel consumption.

Electric parking brake
As a new feature in Mercedes-Benz roadsters, the electrically operated parking brake in the new SLK helps in the design of a generous interior. Its switch is located in the dashboard, under the rotary light switch. Pressing this engages the electric parking brake, and pulling releases it. In models with an automatic transmission the brake is released automatically as soon as the engine is running, the transmission is in the
D or R position, the driver has a fastened seat belt and the accelerator is operated.

Direct and comfortable – the steering of the SLK
Like the preceding model, the base version of the new SLK has a constant-ratio steering system, however the ratio is more direct. This means that instead of 2.8, only 2.6 turns of the steering wheel are necessary from lock to lock.

The Dynamic Handling package includes a hydraulically assisted Direct-Steer system. This increases the agility and controllability of the SLK compared to the standard steering, and improves steering comfort when parking as less effort is required. It combines these attributes with predictable and safe steering characteristics at high speeds. As a result, the agile cult-roadster corners even more willingly and precisely, allows relaxed cruising on motorways and makes for even more exhilarating driving pleasure.

The new Direct-Steer system was developed from the familiar speed-sensitive steering that Mercedes-Benz offers for many of its models. In this case the steering effort depends on the vehicle speed – the effort required increases with the speed. In practice this means more steering comfort during parking manoeuvres and more safety at higher speeds, for example on motorways, where a greater steering effort ensures safe straight-line stability.

The new Direct-Steer system retains these positive attributes of speed-sensitive steering and adds a variable steering ratio that changes according to the steering angle. The ratio is indirect when the steering is centred, which ensures good straight-line stability and therefore a high level of safety. In contrast to other variable steering systems, the ratio of the Direct-Steer system increases rapidly after a steering angle of 5 degrees, becoming extremely direct from a steering angle of just 100 degrees. Only relatively small steering movements are then needed to make course corrections.

This has the following effect in practice: even at urban driving speeds, the driver needs to perform less pronounced steering movements, making changes in direction possible more rapidly and with less effort. The effect of the Direct-Steer system is even more impressive on winding country roads, where only small steering movements are sufficient to steer the vehicle. Even on tighter bends, the driver’s hands hardly need to change their grip on the steering wheel. Rapid sequences of bends can be mastered almost intuitively safely and precisely, and with enormous enjoyment. This all adds up to considerably more agile handling.

The increase in driving dynamics is also aided by an increased yaw rate (steering response) at low to medium speeds, as this augments the effect of the steering movement. At high speeds this increase in yaw rate is small, which means that the car responds safely and predictably to steering movements.

Despite its remarkable effect, the key component of the Direct-Steer system is simply a steering rack. Its secret lies in the teeth cut into it. In the mid-area these are slightly wave-shaped, with varying flank profiles. To both sides the teeth are spaced at varying distances apart. The change in steering ratio is therefore produced by purely mechanical means. With this solution, Mercedes engineers have been able to dispense with the complex actuators and sensor systems used by other variable steering systems. The advantages include very low susceptibility to faults and low weight. Moreover, the system always responds predictably and in the same way, while other variable steering systems sometimes require rapid adaptation by the driver in rapidly changing situations.

ECO steering servo pump lowers fuel consumption
Driving straight ahead in the new SLK also means saving fuel. This is ensured by an ECO steering servo pump as standard in all SLK models. Its centrepiece is an electrically actuated proportional solenoid valve which variably opens a bypass aperture at the pressure connection to feed the steering gear with just the right amount of fluid. As the steering has a lower energy requirement when driving straight ahead, the throughflow pressure in the steering system can be minimised. Less energy is therefore consumed.

Source: Daimler AG

The four-cylinder engines in the SLK 200 BlueEFFICIENCY and SLK 250 BlueEFFICIENCY develop 135 kW (184 hp) and 150 kW (204 hp) respectively from a displacement of 1796 cubic centimetres. The SLK 200 BlueEFFICIENCY has the lowest CO2 emissions in its segment. With the enhanced, optional seven-speed automatic transmission 7G-TRONIC PLUS it consumes just 6.1 litres of premium petrol (NEDC, combined) over 100 kilometres, corresponding to 142 g of CO2 per kilometre. This sporty model sprints from 0 to 100 km/h in 7.0 seconds, and achieves a top speed of 237 km/h (240 km/h with manual transmission). The SLK 250 BlueEFFICIENCY is equipped with an automatic transmission as standard, and consumes only 6.2 litres (NEDC, combined) per 100 kilometres (144 g of CO2 per kilometre). From standstill it reaches 100 km/h in 6.6 seconds, and has a top speed of 243 km/h.

The V6 engine in the SLK 350 BlueEFFICIENCY generates 225 kW (306 hp) from its 3498 cubic-centimetre displacement, using this power to accelerate from 0 to 100 km/h in 5.6 seconds (top speed 250 km/h). Its consumption is 7.1 litres (NEDC, combined) per 100 kilometres (167 g of CO2 per kilometre). The V6 engine has been completely newly developed. Its most important hallmarks are 3rd-generation direct injection, piezo injectors and multi-spark ignition.

Key engine data for the new SLK-Class

Thanks to the great efficiency, it was possible to reduce the tank capacity of the new SLK-Class to 60 litres (a 70-litre tank is available as an optional extra). Nonetheless the operating range is more than 900 kilometres, or more than 800 kilometres for the SLK 350 BlueEFFICIENCY. From autumn 2011 the new SLK will also be available with a powerful diesel engine.

Four-cylinder with a bite
The four-cylinder engines for the new SLK follow the so-called downsizing principle, with the reduced cubic capacity compensated by homogeneous direct injection and turbocharging. This leads to advantages such as lower weight and reduced in-engine friction. A smaller engine also moves the operating range of the characteristic map towards more favourable values, with consequent fuel consumption benefits.

The direct injection system of the four-cylinder engines has an injection pressure of up to 140 bar. In the interests of improved efficiency, this allows the compression ratio to be increased versus a conventional duct injection system. The fuel evaporating directly in the combustion chamber also lowers the temperature in the combustion chamber, reducing the engine’s tendency to knock. The engine is homogeneously charged.

The same turbine rotors are used to generate charge pressure in both output variants of the four-cylinder engine. The single-flow turbocharging of the four-cylinder units operates more efficiently than a mechanical charger, as no engine output needs to be devoted to the charger.

Other characteristics of the four-cylinder engines include a four-valve concept with forged intake and exhaust camshafts, as well as camshaft adjustment on the vane-cell principle. This enables the valve timing to be rapidly and variably adjusted. The result is high torque even at low engine speeds, and a higher specific output.

The crankcase and cylinder head are cast from aluminium alloy. The crankshaft is likewise cast, and has eight counterweights. To compensate the secondary masses inherent to a four-cylinder in-line engine, two Lanchester balancer shafts rotate within the crankcase at twice the crankshaft speed.

An electronically controlled thermostat ensures logic-controlled engine warm-up (no coolant flows through the cylinder head when the engine is cold), and therefore intelligent thermal management. The warm-up phase is shortened as a result.

Sporty engine note
A sporty engine note produced by a new sound generator lends an acoustic backdrop to the 4-cylinder variants of the new SLK. This generator is located immediately in front of the throttle flap, and “enriches” the engine note with elements of the intake noise. It filters out certain frequencies from the intake noise and conducts them into the vehicle interior via a pipe connection – an ingeniously simple and very convincing solution for a sporty and emotionally appealing engine sound.

New V6 engine with innovative technology
The six-cylinder engine is a member of the new V6 family for which Mercedes-Benz has developed the currently most efficient form of direct injection. Known as BlueDIRECT, this innovation establishes the V-engines from Mercedes-Benz as worldwide benchmarks and makes a further reduction in fuel consumption by 20 percent possible by in-engine measures alone.

The V-angle of the new V6 engine is only 60 degrees. This enables the balancer shaft for primary vibrations to be omitted. As a result, the driver notices an excellent level of comfort.
The crankcase, pistons and cylinder heads of the V6 are of aluminium. The crankshaft, connecting rods and valves are of special forged steel.

The technology package in the new engine generation includes a number of new developments that are unique in this combination:

• In combination with multi-spark ignition, a further developed,
  third-generation spray-guided direct fuel injection system with piezo-electric injectors offers further possibilities for fuel savings by means of a new, stratified combustion process with a considerably extended characteristic map and fuel-efficient lean-burn technology.
• Power consumption by ancillary units has been reduced. These include an optimised water pump with 2nd-generation thermal management, a demand-controlled oil pump, a volume-controlled high-pressure fuel pump and an intelligent generator management system.

Lightweight construction techniques and detailed improvements have also reduced in-engine friction considerably compared to the previous engine.

Third-generation direct-injection system
Spray-guided direct petrol injection, which Mercedes-Benz was the first car manufacturer to introduce in series production, has been developed further as a third generation. The system pressure is up to 200 bar, the pressure being variably optimised according to the engine’s characteristic map. Completely newly developed piezo-electric injectors allow up to five injections per intake stroke for the best possible mixture formation.

The crystalline structure of the piezo-ceramic changes in microseconds under an electric voltage, and with a precision of just a few thousandths of a millimetre. The central component of a piezo-electric injector is the piezo-stack, which directly controls the metering needle. With a response time of just 0.1 milliseconds, the fuel injection can be very sensitively and precisely adjusted to the current load and engine speed, with a beneficial effect on emissions, fuel consumption and combustion noise.

In the V6 unit, the multiple injections even in tiny quantities made possible with piezo-electric injection technology were used by Mercedes-Benz engineers to control a wider, usable characteristic map with the efficient lean-burn process, and to provide the conditions for further functions.

As the first new operating mode, Mercedes-Benz engineers have developed “Homogeneous stratified combustion” (HOS). As the name implies, HOS is a combination of homogeneous lean-burn and classic stratified combustion. With the engine unthrottled, the first injection is sprayed into the intake stroke, forming a homogeneous basic mixture. Actual “stratified” injection takes place during the compression stroke before ignition, and is a single or double injection depending on the characteristic map.

Another new operating mode is known as “Homogeneous Split” (HSP). In this homogeneous combustion process, more than 95 percent of the fuel is singly or multiply injected, followed a very small “ignition” injection to stabilise combustion. This is used when combustion conditions are difficult.

The characteristic map of the new Mercedes-Benz V6 engine is therefore basically divided into up to four areas:

• idling range àhomogeneous
• low partial load up to 4 bar and 3800 rpm àstratified
• medium partial load 4 to 8 bar and up to 4000 rpm àHOS
• high load and entire engine speed range àhomogeneous or HSP

Multi-spark ignition for optimal efficiency
The third-generation direct injection system also features rapid multi-spark ignition (MSI). Following the first spark discharge and a brief combustion period, the coil is rapidly recharged and a further spark is discharged. The MSI system enables up to four sparks to be discharged in rapid succession within one millisecond, creating a plasma with a larger spatial expansion than conventional ignition. Controlling this rapid multi-spark ignition enables both the time lapse before the next spark and the combustion duration for the relevant operating point to be optimally adjusted. This provides scope for optimising the centre of combustion and improving residual gas compatibility, especially during stratified charge operation. Fuel consumption can be reduced by roughly two percent in this way.

Fuel savings of up to 4 percent are possible alone by the use of piezo-electric injection technology in combination with multi-spark ignition, depending on the driving cycle.

Cylinder head with new camshaft adjuster
Mercedes-Benz engineers modified the variable, hydraulic vane-type camshaft adjusters for the intake and exhaust sides using the basic architecture of the preceding engine. These now have a larger adjustment range of 40 degrees with reference to the crankshaft. They were also able to improve the functionality, achieving a 35 percent greater adjustment speed and adjustability at an oil pressure as low as 0.4 bar. Despite the better performance, this new development excels with significantly smaller dimensions and low weight. For this reason the installation space on the longitudinal and vertical axes of the engine was able to be reduced by around 15 millimetres.

Two-stage chain drive for low noise
The extreme compactness of the camshaft adjusters was achieved by the new, two-stage chain drive. This drives two secondary chains – one per cylinder bank – via a primary chain and an intermediate gear. All three chains can be individually adjusted via a chain tensioner. This results in low tensioning forces and low chain dynamics, ensuring consistent timing and outstanding acoustic properties, with friction reduced even further. In short, the new chain drive is compact and ensures low-noise operation.

Exhaust system for stringent emission standards
The exhaust systems for the SLK were developed to meet the exhaust emission standards Euro 5 and ULEV, as well as noise emission standards. The exhaust system for the 4-cylinder petrol engine consists of a firewall catalytic converter, a centre muffler and two rear mufflers.

The emission control system for the V6 petrol engine has a firewall catalytic converter for the right and left cylinder banks. The exhaust gases then flow into storage-type NOx catalytic converters. These are followed by a twin-pipe centre muffler and rear mufflers designed as reflection/absorption mufflers on the left and right. The system is rounded off by two exhaust tailpipes on the right and left.

ECO start/stop function with intelligent direct-start
The exemplary efficiency, with fuel consumption reduced by up to a quarter compared to the preceding model, is also due to the ECO start/stop system which is fitted as part of the standard specification in all models – now also with the 7G-TRONIC PLUS automatic transmission.

Realising an auto-stop and auto-start function at the high comfort level of a Mercedes-Benz requires complex control logic, a number of new or modified components and a heavy-duty starter motor. Operating principle:

• As a general principle, the engine is switched off every time the vehicle comes to a standstill (auto-stop function)
• With an automatic transmission, there is always an automatic restart when one of the following conditions is met – the driver operates the accelerator, the transmission is shifted to R, the transmission is shifted from P, the driver releases the brake pedal and Hold is not activated.
• With a manual transmission, there is always an automatic restart when one of the following conditions is met – the driver operates the accelerator, the driver operates the clutch.

Restarting the engine (auto-start function) takes place almost imperceptibly; and moving off without any noticeable time lag compared to a stationary vehicle with its engine running. This is because the new start/stop system uses starter-supported direct-start. This means that when the engine stops, a new crankshaft sensor identifies the rotational position of the crankshaft and enables the engine control unit to identify the cylinder in which the piston is ideally positioned for restarting. The fuel is injected into this cylinder first, thereby speeding up the starting process. The engine is then briefly turned over by the starter, immediately making reliable injection, ignition and combustion possible. On restarting, a reduced fuel quantity can be injected directly into the first cylinder to ensure a fast starting procedure, e.g. at traffic lights.

An additional electric transmission oil pump supplies the clutches of the automatic transmission with oil pressure prior to starting, so as to enable a swift resumption of the journey after direct starting of the combustion engine via the ECO start/stop function. The starter motor (starter) has also undergone thorough modification: it is now designed to cope with eight times as many starting procedures, ensuring that it will last a car’s lifetime in continuous urban driving involving frequent auto-starting. In addition, the on-board electrical system is supported by a second battery.

Automatic transmission with fuel economy benefits
The SLK 200 BlueEFFICIENCY is equipped with the familiar 6-speed manual transmission, which excels with a short, sporty shift travel. The improved 7G-TRONIC PLUS seven-speed automatic transmission is available for this model as an option, and is standard equipment for the other two engine variants (a 6-speed manual transmission will be available as an alternative for the SLK 250 BlueEFFICIENCY at a later date). It has undergone extensive further development with the aim of achieving an engine connection with further decreased torque converter slip, a significant reduction in internal losses and therefore optimised efficiency. Mercedes-Benz developers subdued eccentricities and vibrations in the transmission by incorporating a new torsion damper, for example. This is designed as a twin-turbine damper, and also makes comfortable vehicle operation possible at low engine speeds.

In ECO mode this has enabled engine speeds to be reduced as a result, with a considerable contribution to fuel economy (up to seven percent). It also allows an even faster response to accelerator commands. A new hydraulic circuit and optimised torque converter mapping also contribute to better start-off performance. As a further fuel economy measure, a new transmission fluid with a lower viscosity and a long service life for the same cooling performance is used. This means that replacement of the transmission fluid is only necessary every 125,000 kilometres.

The optimised electrohydraulic control unit of the transmission and new reduced-friction materials in various parts of the transmission in combination with optimised software result in improved shifting comfort. Owing to an optional, additional demand-controlled ATF pump, 7G-TRONIC also can feature a start/stop function for the first time. This pump ensures readiness to move off when the internal oil pump is not operating.

Adjustable radiator shutter not only saves fuel
For the first time in a sports car, and depending on the engine variant and country version, Mercedes-Benz uses an adjustable radiator shutter in the SLK. This enables the airflow through the engine’s cooling module and engine compartment to be variably controlled. A circular, louvred shutter arranged parallel to the fan improves the aerodynamics, which in turn lowers fuel consumption. The engine also reaches its normal operating temperature more rapidly, heating comfort is improved and engine noise is suppressed even more.

Diesel variant and an AMG version to follow
In the fourth quarter of 2011 a powerful four-cylinder diesel engine will be available for the new SLK. In 2012 the SLK 55 AMG will follow with a new V8.

Source: Daimler AG

In a Mercedes-Benz SLK, even rainy weather does little to mar this pleasure. Ever since the launch of the first SLK in 1996, this has been ensured by a vario-roof which converts the roadster into a coupé with a fixed roof at the touch of a button, and in just a few seconds. Since then, Mercedes-Benz engineers have constantly refined the vario-roof even further and maintained the SLK’s pioneering role in this technology.

12►

Unique item of equipment: MAGIC SKY CONTROL
For the first time, Mercedes-Benz is offering a choice between three variants of the lightweight vario-roof for the new SLK:

• The base version is a roof painted in the vehicle colour
• Alternatively there is the option of a panoramic vario-roof with tinted polycarbonate.

The third variant is a world premiere – the panoramic vario-roof with MAGIC SKY CONTROL. This glass roof switches to light or dark as required at the press of a button. When light it is virtually transparent, offering an open-air experience even in cold weather. In its dark state the roof provides welcome shade and prevents the interior from heating up when the sun’s rays are very intense. In other words: a feel-good atmosphere at the touch of a button

The operating principle is based on the physics of a plate condenser: if the glass structure is subjected to an electrical voltage, particles in the structure position themselves so that light is able to pass through the glass. If the voltage remains switched off, however, the particles position themselves randomly. This partially blocks the light, and the glass remains dark. The control unit and converter are integrated into the front section of the roof, and the switch is in the overhead control console.

In addition to the unique panoramic effect and transparency at the touch of a button, MAGIC SKY CONTROL also provides a top-class feel-good atmosphere. UV and infrared light are also effectively blocked in transparent mode, while insulation increases even more significantly and noticeably in darkened mode, thereby helping to keep the temperature on interior parts such as armrests cooler by up to 10 degrees Celsius compared with conventional tinted glass.

Measurements using a device called a star pyranometer in Death Valley, one of the world’s hottest places, impressively demonstrated the effect. This device measures the intensity of exposure to sunlight. With an open roof, the thermal load from the sun in the heat of Death Valley reached 1000 to 1100 W per square metre. With the transparent glass roof it dropped to 200 W, and when the roof was switched to darkened mode with MAGIC SKY CONTROL, it dropped to 40 to 50 W – one 20th of the original value and less than a 60 watt bulb.

Since the innovative glass also shields against the sun’s rays far more effectively than conventional thermal insulation glass or sunblinds, the occupants of the new SLK also enjoy the highest level of climatic comfort. When driving with the roof open would be unpleasant owing to intense heat, the driver and front passenger are able to relax under the MAGIC SKY CONTROL roof – an important contribution to onboard comfort and the driver-fitness safety typical of a Mercedes. Even when the vehicle is at a standstill the interior does not overheat, since the roof is switched to darkened mode when powered off.

But MAGIC SKY CONTROL not only benefits passengers. Some of the strain is also taken off the air-conditioning system, thereby saving on CO2 emissions.

In addition, the frame of the three roof variants is now of magnesium. This makes each roof around six kilograms lighter than in the previous model, giving the car a lower centre of gravity.

The engineers have also refined the operating mechanism for the roof and boot lid. It now takes less than 20 seconds to open or close the roof completely. The improved mechanism mainly benefits the boot capacity.

Boot fully suitable for everyday use
The luggage capacity with the vario-roof closed is 335 litres (in conjunction with TIREFIT). This is enough to accommodate two crates of soft drinks and two crates of beer, or four of either, without difficulty. A golf bag or a large suitcase are also no problem.

When the roof is opened, the capacity is reduced by 110 to 225 litres. This includes 51 litres of luggage box capacity under a reversible floor (the box is omitted if a collapsible spare wheel is chosen instead of TIREFIT). In any case there is sufficient space for two large sports bags, for example with tennis equipment.
The luggage box or collapsible spare wheel is accessible if the variably usable reversible floor is removed. Depending on the application, it provides a level surface or a recess for carrying e.g. high drinks crates. The draught-stop or an umbrella can be secured with elastic straps on either side of the reversible floor.

To prevent luggage items from colliding with the roof components while these are being deposited in the boot, there is a luggage cover in the boot which can be pivoted longitudinally. The vario-roof can only be opened if this cover is pivoted to the rear, and when the roof is closed the cover can be easily pivoted forward by hand. This facilitates loading and unloading, and makes the full boot capacity available.

Bodyshell structure with aluminium components
The bodyshell structure already proved highly successful in the preceding model, and was weight-optimised still further for the new SLK. Accordingly the bonnet and front wings are of aluminium for the first time, as are the dashboard cross-members and the rear end. The rear bulkhead module of fibre-reinforced plastic is a new feature. The torsional rigidity of this optimised lightweight steel construction was improved even further compared to the already very rigid preceding series. Thanks to the intelligent use of lightweight construction methods, the bodyshell weight was reduced by around 13 kilograms.

The doors are a completely new development, with reinforcement at the beltline and at the lower edge. A section of high-strength steel ensures good side impact protection. The well-proven A-pillars with welded-in oval tubes of hot-formed ultra-high-strength steel and a robust nodular connection to the side members remain unchanged.

To keep the cost of minor damage caused by a frontal impact at speeds up to 15 km/h reasonable, the front side members have a prescribed cutting point for a sectional repair, and their shape causes them to bend ahead of this area in the event of a collision.

Exemplary aerodynamics
Despite the more striking, steeper front and the just under three percent larger frontal area compared to the previous model, the Cd value for the new SLK has been cut to just 0.30 – a very good figure for a roadster (the preceding model had a Cd value of 0.32). This improvement has enabled CO2 emissions to be reduced by roughly one to two grams per kilometre. Once again this shows that the engineers at Mercedes-Benz have made good use of many possibilities to enable SLK owners to enjoy the fun factor in the new roadster with an easy conscience – thanks to its high environmental compatibility.
The aerodynamic data for the new SLK-Class

The aerodynamic data for the new SLK-Class

In addition to familiar features such as a spoiler lip on the upper edge of the boot lid, wheel spoilers in front of the front and rear wheels, and a full engine compartment and underbody cladding concept, the excellent drag coefficient is especially due to:

• A radiator shutter for demand-related control of the cooling airflow,
• highly aerodynamic tyres,
• newly designed exterior mirrors and
• painstaking modifications to the A-pillar cladding.

The A-pillar cladding is a good example of meticulous development work. It took more than one year to develop a plastic cover that would combine high design requirements with exemplary functioning perfection. The result is a pillar cover with a fine front edge and a drainage channel on the upper surface. This ensures a very close airflow and therefore a significant reduction in air resistance, as well as very good results in terms of draught protection, aeroacoustics and reduced soiling of the exterior mirrors and side windows.

Innovative draught-stop system AIRGUIDE
To reduce draughts when driving with the roof open, the SLK can be fitted with a draught-stop. This consists of a net with a fixed frame which is installed between the head restraints. When not in use it can be stowed in the boot, where it occupies little space.

A comfortable alternative to the conventional draught-stop is a new pivoting draught-stop for the new SLK which has been invented by Mercedes-Benz aerodynamics engineers. It consists of pivoting transparent plastic layers which are attached to the reverse of the roll-over bars. This is the world’s first draught protection system that enables different comfort levels to be selected for two occupants, as the driver and passenger can individually pivot the units to the centre of the vehicle in a flash, thus taming turbulent air flow from the rear. Advantage: no installation or removal effort is required.

Modern headlamp technology and LED daytime running lamps
In the base version the new Mercedes-Benz SLK is equipped with single-tube H7 headlamps. These are combined with round daytime running lamps with chromed surrounds in the bumper. On request, horizontally arranged, elongated LED daytime running lamps with four LEDs can be fitted in a chrome clasp to give the SLK an even more striking front. If the vehicle is equipped with the Intelligent Light System or the AMG Sports package, these LED daytime running lamps are included. A manually operated and electrically activated headlight beam control system is standard equipment with halogen headlamps. The Intelligent Light System has automatic headlight beam control.

Alternatively the new SLK can be equipped with the Intelligent Light System (ILS) developed by Mercedes-Benz.The Intelligent Light System provides five lighting functions (cornering light function, country mode, motorway mode, active light function and enhanced fog lamps), which are activated depending on the driving conditions. In this case the main headlamps are twin-tub units, and for the first time the indicators and position lights are in LED technology.

The ILS headlamps automatically feature dynamic headlamp range control. This automatically adjusts the angle of the light beam to changes in the car’s attitude – for example pitching movements when braking and accelerating – and when the attitude changes if a load is carried.

The wide tail lights of the new SLK are for the first time in full-LED technology. This not only ensures an unmistakable night design, but also enables LEDs to shine with different intensities in specific areas of the tail light cluster, depending on their lighting function. LED technology has other advantages: compared to conventional bulbs they light up around 150 milliseconds faster, and also have a considerably longer operating life – a safety aspect that should not be underestimated.

Source: Daimler AG

Behind the long bonnet is a compact passenger compartment positioned far back, and a short tail end. The SLK will tempt potential customers with the key attributes that characterise all the classic roadsters from Mercedes-Benz, and that have also made many of them automotive icons.

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Professor Gorden Wagener, Head of Design at Mercedes-Benz Cars: “The SLK continues the illustrious roadster tradition of Mercedes-Benz, and excitingly takes it into the future. The design idiom accentuates its lively, sporty presence, and is also sculptural. It expresses personality and sensuality. The same applies to the interior. High-grade materials, lovingly crafted details and a very exclusive finish characterise the essentially very sporty atmosphere.”

Striking front end
The first feature to catch the eye is an upright radiator grille that stands proud and confident in the wind, bearing the new face of the Mercedes-Benz brand. It facilitates the long and well-proportioned bonnet and with its rearward light-catching contours it already hints at the roadster’s dynamic qualities. The bonnet ends with two air intake grilles in front of the windscreen, each embellished with three louvres.

The wide radiator grille bears the Mercedes-Benz star in a prominent central position and displays a powerfully contoured fin, chromed at the front. The clearly defined headlamps complete the look for the new SLK’s face, and daytime running lamps with chrome surrounds (round lamps in the base version) in the bumper round off the front end. The “face” of the new SLK is reminiscent of the legendary 190 SL from the 1950s, which is regarded by many as being the original “SLK”. But it was certainly not just the past that the designers were focusing on; with the new SLK’s front end they also intentionally created a close visual link with the new Mercedes-Benz SLS AMG “gull-wing model” and the new CLS.

The amazing and measurable proof of the meticulously detailed work that has been carried out is that in spite of the more striking, steeper front and the larger frontal area, the Cd value has been cut to just 0.30 (preceding model 0.32).

Dramatic lines
The classic, timeless lines of the side aspect with its typical roadster proportions embodies the utmost aesthetic appeal with a visual assurance of sportiness and fun. The vario-roof spans the interior like a drawn bow. When opened it disappears into the boot, creating the typical roadster silhouette. From any angle and in any position it blends harmoniously into the overall design. A fillet conceals the boot joint, so that it does not disturb the side aspect as with similar roof designs. Neither are the lines disturbed by aerials in most equipment variants: in most cases they are integrated into the windscreen, rear window and parcel shelf.

The air outlet grilles with a chromed fin in the front wings are reminiscent of the famous Mercedes-Benz 300 SL Roadster from the 1950s. In the new SLK they form the elegant starting point for a feature line which extends right back to the muscular rear wings, and uses light and shadow to lend style and elegance to the side aspect.

This is emphasised by the stemmed exterior mirrors, which are positioned on the beltline where they allow a better forward view to the side. With their very narrow stems painted in the vehicle colour, these make a sporty and filigree impression. Their sophisticated aerodynamics also help to keep the side windows practically dirt-free, while ensuring a low level of wind noise.

Depending on the engine variant, the wheel arches house 16 or 17-inch light-alloy wheels, or 18-inch wheels with mixed-size tyres in conjunction with the sports suspension.

Muscular rear end
At the rear the eye is drawn to the integrated spoiler lip and wide tail light clusters. The roll-over bars feature double-skinned plastic claddings with a high-quality soft-look surface. As an optional extra these rear claddings can be of anodised aluminium.

For the first time, the tail lights with their pronounced horizontal emphasis are in all-LED technology. Their upper edge extends forward into the sides, harmoniously culminating in the feature line. A twin exhaust system with trapezoidal tailpipes rounds off the muscular impression created by the rear view.

High-grade materials and stylish sportiness
The new SLK is 31 millimetres longer and 33 millimetres wider than its predecessor. With the most compact dimensions in its class, the new SLK has an interior whose generous size is nonetheless exemplary. To achieve this, the designers have developed interior appointments which offer the driver and passenger outstanding perceived value, purist precision and a real feel-good ambience. The interior in the base colour black is characterised by sporty refinement, well thought-out ergonomics and high-quality, authentic materials which have been processed with painstaking attention to detail and skilled craftsmanship. Even in the base version, the centre console and other trim parts gleam in brushed aluminium. Wood can be selected as an option in high-gloss dark brown walnut or high-gloss black ash.

Echoing the exterior design, the black dashboard emphasises the horizontal lines and therefore width of the vehicle. On request it is available in a two-tone colour scheme and with a leather lining. Four round, galvanised air vents similar in form to those in the SLS are recessed into the dashboard, underlining the car’s membership of the Mercedes-Benz sports car family and at the same time deliberately creating associations with the dynamism of jet aviation.

Two large dial instruments – a speedometer and a rev counter – flank a display for the information generated by the online computer. The display menus can be conveniently accessed by the driver using the control buttons on the steering wheel, without taking his eyes off the road. The colour display for the communication and entertainment functions is housed in the centre of the dashboard, and can be easily read by both the driver and passenger. A comfortably shaped controller on the centre armrest ensures safe and easy operation.

On the top of the dashboard, also in the centre, sits a fine analogue clock (optional), subtly underlining the roadster’s stylish character.

An easily handled (diameter 375 millimetres) multifunction sports steering wheel with a flattened bottom section and a thick leather rim makes the high quality and sporty character of the new SLK a constant tactile experience. Metal trim on the spokes enhance the impression of both sportiness and refinement. Shift paddles to perform upshifts and downshifts in the automatic transmission are available as an option. The interior can be enhanced even further with a wood/leather steering wheel.

The sweeping lines of the upper dashboard section are continued into the door panels. The door centre panel is colour-coordinated with the interior. The door openers and seat adjustment switches are trimmed in aluminium or wood.

Sporty yet comfortable seats
The sporty, ergonomic seats with adjustable, crash-responsive NECK-PRO head restraints integrated into the backrests have high side bolsters for optimum lateral support and a high level of comfort on long journeys. Maximum operating convenience and seating comfort is ensured by optional electric seat adjustment with a memory function and 4-way lumbar support.

In the base version the new SLK is equipped with black fabric seats. There is also a choice of:

• embossed leather in black, sahara beige or crystal grey,
• nappa leather in black, bengal red or moccha/nut brown, or
• Exclusive nappa leather – in this case the upper dashboard section and the doors are lined with black nappa leather.

All leather and nappa leather seats are upholstered with leather which noticeably reduces heat build-up. The leather has a special coating which reflects the sun’s rays. Comparative measurements have shown that this leather reduces the temperature of the seats by more than ten degrees Celsius – a significant improvement in comfort when the car has been parked in the sun.

As in the previous model, the neck-level heating system AIRSCARF is available as an optional extra for the new SLK. This creates a flow of warm air around the neck and shoulder areas of the occupants from a vent in the front of each head restraint.

Magical lighting
An ambient lighting system available as an option for the first time creates an impressive effect in the interior of the new SLK. It consists of discreet optical fibres and spots in SOLAR RED, which produce an extremely pleasant yet sporty lighting effect in the door panels, around the door pulls and on both sides of the centre console. This mood-enhancing ambient lighting is activated when the doors are opened (“welcome home” effect), and its intensity can be individually varied by a dimmer. The central lighting unit in the overhead control panel has two interior lights and a centre console spotlight.

Clever stowage compartment concept
For a two-seater roadster, the new SLK has an exemplary variety of stowage facilities in the interests of versatility and day-to-day utility. The basis for this well conceived interior concept is a large glove compartment with a remarkable capacity of 6.4 litres. Useful features such as holders for a pen, credit cards and coins are integrated into the glove compartment lid.

There are three stowage compartments in the centre console – below the air conditioning controls (this can be replaced by an ashtray on request), next to the controller in front of the armrest (roller-top compartment, optionally a drinks holder) and under the armrest with a 12 V socket, USB interface and AUX connection (optionally a media interface for integration of e.g. an iPod and mobile phone connection). A net attached to the tunnel in the passenger footwell can be fitted with a flexible bottle-holder which can securely accommodate even 1.5-litre bottles.

Excellent climate
The new SLK is equipped with air conditioning as standard. The automatic climate control system THERMOTRONIC with separately adjustable interior temperatures for the driver and passenger is available on request.

An example of the detailed refinements: a windscreen demisting sensor in the stem of the rear-view mirror registers the glass temperature and interior humidity level of the new SLK. In dry weather, when no cooling is required but A/C is operating, the control system powers the compressor down but activates it as soon as it registers that the windscreen is misting up. This has two advantages:

• The A/C function can remain active all the time, but the demand-controlled system saves energy.
• As the air conditioning only demoisturises and cools as much air as is required to maintain the interior temperature, the air is never too dry and this benefits the physical comfort of the occupants.

Source: Daimler AG

it combines lightfooted sportiness and exciting open-air enjoyment with stylish comfort, a striking sports car design with full day-to-day suitability and peak performance with exemplary environmental compatibility.

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“The new SLK embodies the role of the trend-setter like no other car,” says Dr Dieter Zetsche, Chairman of the Board of Management of Daimler AG and CEO of Mercedes-Benz Cars. “I am convinced that with its passionate design, its high-quality interior and its modesty at the filling station, it will also continue to provide an enormous amount of fun on the road in future, consolidating its status as a cult roadster.”
Innovations are part of the successful history of the Mercedes-Benz SLK:

• In 1996 the first generation caused a sensation with the vario-roof, which transformed the wide-open roadster into a coupé with a fixed roof at the touch of a button in just a few seconds;
• The second generation placed the warm AIRSCARF around the neck and shoulders of the occupants as needed, ensuring pleasurable open-top motoring even in cooler temperatures;
• For the very first time, the third generation offers a choice between three variants of the much-imitated vario-roof. One of these is celebrating its world premiere – the transparent panoramic vario-roof with MAGIC SKY CONTROL, which can be switched to light or dark. It therefore offers a choice of an open-top feeling even when the roof is closed, or provides shade in strong sunshine and prevents the interior from heating up. Alternatively the vario-roof is available in painted or glass versions.

The highlights of the new Mercedes-Benz SLK also include a striking and masculine sports car design, a sporty and refined interior with authentic, high-grade materials and a choice of three suspension variants – a standard suspension, a sports suspension or a suspension with automatically adjustable damping.

Dr Thomas Weber, Member of the Board of Management responsible for Group Research and Head of Development, Mercedes-Benz Cars: “With the SLK we offer a wide range of technical alternatives to give customers a personal choice. Among them are a number of unique innovations. Moreover, the SLK is a prime example of how impressive performance, stylish driving comfort and high ecological standards can go hand in hand. In the 125-year history of the automobile, we have never experienced such major leaps in efficiency. Lower fuel consumption and even more driving pleasure – a formula we certainly translate into reality in the SLK.”

Outstanding on all fronts
The best or nothing – this motto is at the heart of the Mercedes-Benz philosophy, and also the guiding theme for the new SLK. The original book of specifications already laid down that the design characteristics of the new roadster must not be one-sided, but must ensure top performance in all major disciplines. Mercedes-Benz engineers have rigorously translated this requirement into reality, and given the SLK attributes that guarantee the roadster a peak position in its segment in multiple respects. Among them are extremely compact dimensions combined with an extremely generous interior providing a feel-good atmosphere and numerous practical features. Naturally outstanding performance and sporty, agile handling are also major characteristics of the new SLK. Moreover, the new SLK is the most economical

• petrol model in its class, with three new, efficient and powerful direct-injection engines plus the ECO start/stop function,
• and also the safest roadster with its unrivalled range of safety features.

Dr Joachim Schmidt, Head of Sales and Marketing at Mercedes-Benz Cars: “Firmly embedded in the genes of the SLK is exhilarating driving pleasure in any weather conditions, open or closed, for recreation or day-to-day motoring. It combines its decidedly sporty character with outstanding comfort and high-grade appointments. The new SLK also sets new standards among the compact roadsters where fuel economy and environmental compatibility are concerned. A wealth of outstanding attributes and technical innovations will once again make it the benchmark in its class – and undoubtedly also a success for our brand. The SLK is a roadster with a character, and everyone will want it.”

A look back at the success achieved by the preceding models. Since the first generation was launched, the SLK has won the enthusiasm of more than half a million customers.

Even more features
The new SLK has a wealth of new features compared to its already well-equipped predecessor.
New standard equipment

• New-generation 4 and 6-cylinder engines with direct injection
• Adaptive brake lights
• ATTENTION ASSIST
• Audio 20 CD with 5.8-inch colour display, Bluetooth hands-free system, central head unit and USB connection
• NECK-PRO head restraints
• ECO start/stop function
• Electric parking brake (EPB)
• Headbags in the doors
• LED tail lights
• Air conditioning
• Boot with reversible floor and two elastic straps to secure luggage
• Optimised seven-speed 7G-TRONIC PLUS automatic transmission in the SLK 350 BlueEFFICIENCY
• Tyre pressure loss warning system
• Daytime running lamps
• Integrated aerials, also for GPS
• Brushed aluminium trim even for the basic version

New optional extras

• Ambient lighting with colour tone “SOLAR red”
• AMG Sports package
• Analogue clock on the dashboard
• Illuminated door sill panels
• COMAND Online with internet access, 7-inch colour display and central controller
• DAB tuner (Digital Audio Broadcast)
• DISTRONIC PLUS including PRE-SAFE Brake
• Dynamic Handling package with adaptive damping, Torque Vectoring Brake and Direct-Steer system
• Entry-level navigation package “Becker MAP PILOT”
• Speed Limit Assist
• Intelligent Light System with bi-xenon
• KEYLESS-GO
• Exclusive nappa leather
• PARKTRONIC with Parking Guidance
• PRE-SAFE
• Sun-reflecting leather for cooler seats in strong sunshine
• Panoramic vario-roof
• Flex bottleholder
• Panoramic vario-roof with MAGIC SKY CONTROL (switchable transparency)
• Roll-over bars with anodised aluminium inserts
• AIRGUIDE draught-stop

Source: Daimler AG

these are up to 25 percent (SLK) and 31 percent (C-Class) more fuel-efficient than their predecessors. Both have extensive safety features and a number of innovative assistance systems, as well as the new-generation telematic systems. The multimedia system COMAND Online provides internet access for the first time. Customers are able to surf the internet freely while stationary, or access Mercedes-Benz online services while on the move. It is also possible to specify individual destinations and routes using Google Maps, and send these to the vehicle.

And yet they are completely different: the third-generation SLK Roadster is designed for sheer driving pleasure for two, with a striking sports car design and absolute day-to-day suitability. With the new generation of the C-Class Saloon and Estate models, this high-volume model series has now been comprehensively modernised.

The Mercedes-Benz SLK model range:
SLK 200 BlueEFFICIENCY with 135 kW (184 hp): € 38,675 1
SLK 250 BlueEFFICIENCY with 150 kW (204 hp): € 44,256.10
SLK 350 BlueEFFICIENCY with 225 kW (306 hp): € 52,300.50

All-weather driving enjoyment – open and closed, in leisure-time and everyday use – is firmly anchored in the SLK’s genes. This is also aided by the vario-roof, which is available in three versions for the first time: painted in the vehicle colour, as a panoramic vario-roof or as a world first, the panoramic vario-roof with MAGIC SKY CONTROL (€ 2,368.10). This glass roof can be switched to light or dark at the touch of a button. When light it is virtually transparent, offering an open-air experience even in cold weather. In its dark state the roof provides welcome shade and prevents the interior from heating up when the sun’s rays are very intense.

The first feature to catch the eye is an upright radiator grille that stands proud and confident in the wind and bears the new Mercedes-Benz brand look. It facilitates the long bonnet, which is followed by the compact passenger compartment set well to the rear and a short rear end.

The interior is characterised by stylish sportiness and high-quality materials. Even in the base version the centre console and other trim parts gleam in brushed aluminium.

The exemplary efficiency, with fuel consumption reduced by up to a quarter compared with the preceding models, is also due to the ECO start/stop system which is fitted as part of the standard specification in all models.

With respect to safety, the new Mercedes-Benz SLK sets new standards in the roadster segment. Standard features include the Mercedes-Benz developed drowsiness detection system ATTENTION ASSIST. On request, the unique, preventive occupant protection system PRE-SAFE (€ 392.70), DISTRONIC PLUS proximity control with Brake Assist BAS PLUS and PRE-SAFE Brake (€ 1844.50) and other driving assistance systems are available.

To mark the launch of the new SLK, Mercedes-Benz is offering an “Edition 1″ special model with the special paint finish designo glacier grey magno for a limited period. The standard specification of the “Edition 1″ includes the panoramic vario-roof, the Dynamic Handling package, AMG bodystyling and two-tone designo nappa leather with contrasting topstitching. The additional cost ranges from € 10,103.10 to € 10,698.10, depending on the base model.

The new Mercedes-Benz C-Class Saloon range (Estate model in brackets):
C 180 BlueEFFICIENCY, 115 kW (156 hp): € 32,695.25 (€ 34,361.25) 2
C 200 BlueEFFICIENCY, 135 kW (184 hp): € 34,718.25 (€ 36,384.25)
C 250 BlueEFFICIENCY, 150 kW (204 hp): € 39,359.25 (€ 41,025.25)
C 350 BlueEFFICIENCY, 225 kW (306 hp): € 46,529 (€ 48,195)
C 350 4MATIC BlueEFFICIENCY, 225 kW (306 hp): € 48,909 (-) 3

C 180 CDI BlueEFFICIENCY, 88 kW (120 hp): € 32,814.25 (€ 34,480.25)
C 200 CDI BlueEFFICIENCY, 100 kW (136 hp): € 34,599.25 (€ 36,265.25)
C 220 CDI BlueEFFICIENCY, 125 kW (170 hp): € 36,860.25 (€ 38,526.25)
C 250 CDI BlueEFFICIENCY, 150 kW (204 hp): € 39,121.25 (€ 40,787.25)
C 250 CDI 4MATIC BlueEFFICIENCY, 150 kW (204 hp): € 43,881.25 (€ 45,547.25)
C 300 CDI 4MATIC BlueEFFICIENCY, 170 kW (231 hp): € 47,540.50 (€49,206.50)
C 350 CDI BlueEFFICIENCY, 195 kW (265 hp): € 47,540.50 (€ 49,206.50) 4

Dynamic, resolute, self-assured: the exterior of the new C-Class
The front bumper is more assertive and dynamic. The front end has now been aligned with the new design idiom of the brand. The Saloon and Estate now have a new aluminium bonnet, which contributes to weight reduction and therefore fuel efficiency. Its contour in the area of the headlamps and radiator grille emphasises the V-shape of the front section more heavily than before. In conjunction with the newly designed headlamps, this gives the front section a more resolute impression.

Sporty, high-quality interior
A main focus of the design work in the interior was the restyling of the dashboard, with the aim of creating a powerful, sporty and high-quality look. This redesign also involved enhancing the trim concept. The surfaces of the control elements are more finely detailed and galvanised. The stepped extension to the instrument cluster now also accommodates the central display. The instrument cluster and a discreet light-catching contour continue into the front passenger side. The central, trapezoidal air vents and the round vents on the outside are highlighted in detail by galvanised trim.

More power, lower consumption: the engines
Fuel consumption has been reduced by up to 31 percent. The start/stop system is standard equipment for all engine variants, whatever the number of cylinders, fuel type or number of driven wheels. The same applies to the availability of the fuel-efficient seven-speed 7G-TRONIC PLUS automatic transmission. The only exception is the 6-cylinder all-wheel drive diesel (C 300 CDI 4-MATIC), which continues to have the well-proven 7G-TRONIC transmission.

All the engine variants are now classed as BlueEFFICIENCY models, showing that they are particularly efficient and environmentally compatible in their use of fuel. The most economical Mercedes C-Class model is the C 220 CDI BlueEFFICIENCY with a manual six-speed transmission, the ECO start/stop function as standard and an average diesel consumption of 4.4 litres/100 km – 0.4 litres less than before. This corresponds to 117 grams of CO2 per kilometre.

Warning and intervening: the new driving assistance systems
With a total of ten new driving assistance systems ranging from ATTENTION ASSIST drowsiness detection to DISTRONIC PLUS proximity control, the C-Class reaches a new level of safety. The assistance systems are based on the latest radar, camera and sensor technology, and cover frequent accident causes such as driving too closely, fatigue and darkness.

1 all prices include 19% VAT
2 all prices include 19% VAT
3 not available as Estate
4 available from June 2011

Source: Daimler AG

Under the body of the new roadster a gigantic effort has been undertaken, intense engineering work, including several years of test runs. Freezing cold, scorching heat and long-term stress tests — are only three of the many hurdles to overcome to bring the SLK into series production.

Source: Mercedes-Benz.tv

But, let’s start at the beginning:In the Mercedes-Benz Design Centre in Stuttgart. The latest generation of the SLK is unveiled and presented to the world’s press.

Source: Daimler AG

There will initially be three models of the SLK available at its market launch, all of them powered by new engines with direct injection. The four-cylinder engines in the SLK 200 BlueEFFICIENCY and SLK 250 BlueEFFICIENCY develop 135 kW (184 hp) and 150 kW (204 hp) respectively from a displacement of 1796 cubic centimetres. The SLK 200 BlueEFFICIENCY is the most economical roadster in its segment. With the enhanced, optional seven-speed automatic transmission 7G‑TRONIC PLUS it consumes just 6.1 litres of premium petrol (NEDC, combined) over 100 kilometres (that corresponds to 142 g of CO2 per kilometre). The frugal model sprints from 0 to 100 km/h in 7.0 seconds, and achieves its top speed at 237 km/h (240 km/h with manual transmission).

The SLK 250 BlueEFFICIENCY is equipped as standard with the 7G-TRONIC PLUS automatic transmission and consumes only 6.2 litres (NEDC, combined) over 100 kilometres (144 g of CO2 per kilometre). From a standstill it reaches 100 km/h in 6.6 seconds, and it has a top speed of 243 km/h.

The V6 engine in the SLK 350 BlueEFFICIENCY draws 225 kW (306 hp) from its 3498 cubic-centimetre displacement, using this power to accelerate in 5.6 seconds from 0 to 100 km/h (top speed 250 km/h). Its consumption is 7.1 litres (NEDC, combined) over 100 kilometres (167 g of CO2 per kilometre). The V6 engine has been completely newly developed. Its most important hallmarks are its 3rd-generation direct injection, piezo injectors and multi-spark ignition.

Source: Daimler AG

Behind the attractive front end, are modern engines that due tot he standard ECO start/stopp automatic use up to 30% less fuel than their predecessors. Celebrating a world premiere is the „Magic Sky Control“ glass roof. This can either be darkened or made transparent and provides an optimal climate in the interior.

Source: Mercedes-Benz.tv