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Sunday, November 16, 2008
2004 Mercedes-Benz SL 600
(from Mercedes-Benz Press Release) Performance, luxury, refinement -- just three of the outstanding characteristics of the new SL 600 which will complete the successful Mercedes-Benz SL-Class Roadster model range from spring 2003.
A look under the bonnet reveals a technological tour de force in the shape of the newly developed Mercedes twelve-cylinder engine. Equipped with two turbochargers, an air/water intercooler, three valves per cylinder, twin-spark AC ignition and other high-tech innovations, the new unit is one of the most advanced car engines in the world. And one of the most powerful in its class, too: the V12 engine has an output of 368 kW/500 hp and maximum torque of 800 newton metres, which is available from just 1800 rpm and remains on tap at a constant level all the way up to 3600 rpm.
With figures like these, it is clear that the SL 600 has ample resources to cope with every driving situation. It accelerates from 0 to 100 km/h in only 4.7 seconds and polishes off the 60 to 120 km/h sprint in 4.9 seconds. The maximum speed is electronically limited to 250 km/h.
The twelve-cylinder unit combines its impressive performance with exemplary smoothness and extremely quiet operation -- ideal conditions for a refined, highly enjoyable driving experience.
Standard equipment: COMAND, CD changer and sound system
The theme of refinement and enjoyment is also picked up by the exceptionally high level of standard equipment in the new top-of-the-range SL-Class Roadster. Based on the features found in the already luxurious SL 500, it includes interior appointments such as ruffled leather, embossed V12 emblems on the head restraints, soft-texture floor mats with chrome-coloured lettering as well as an elegant wood/leather steering wheel and a wood/leather automatic transmission selector lever. The COMAND system, a CD changer and a sound system are also standard equipment in the new twelve-cylinder sports car from Mercedes-Benz.
The external cues which identify the SL 600 comprise a radiator grille with discreet chrome elements, silver-painted brake callipers, V12 emblems on the side air intakes and bi-xenon headlamps. The light-alloy wheels which are fitted as standard are distinguished by their exclusive rim design. At the front, the sports car is equipped with 255/40 R 18 tyres, while the rear wheels have 285/35 R 18 tyres.
Parking and manoeuvring is made more convenient by the PARKTRONIC system which also forms part of the standard equipment. Superb high-tech systems, such as Active Body Control (ABC), Sensotronic Brake Control (SBC™) (a new type of electrohydraulic brake system), the automatic climate control system which is equipped with advanced sensors, and the innovative vario roof add the perfect finishing touches to the driving experience and also reflect the special position which the SL 600 occupies among the sports cars in its class.
In addition to the new V12 model, SL-Class customers have a choice of three other engine versions: the six-cylinder SL 350 sports car with 180 kW/245 hp, the SL 500 with a 225 kW/306 hp V8 engine and the SL 55 AMG which develops
368 kW/500 hp.
V12 engine: state-of-the-art lightweight power plant features aluminium, steel and magnesium components
The newly developed twelve-cylinder engine of the SL 600 reflects the wealth of experience and expertise which Mercedes-Benz brings to the development of high-tech power plants. The Stuttgart-based automaker is the world's largest manufacturer of V12 engines for passenger cars.
Diecast aluminium is used for the crankcase of the twelve-cylinder engine while the two cylinder-head covers are made from diecast magnesium. Fracture-split conrods made from high-strength forged-steel alloy, pistons made from a high-quality aluminium alloy, hollow camshafts of induction-hardened forged steel, a weight-optimised forged-steel crankshaft and a diecast aluminium sump feature among the other lightweight components of the engine which weighs just 263 kilograms and has a power-to-weight ratio of 0.71 kg/kW.
This exemplary lightweight design is complemented by the engine's equally impressive credentials with regard to its noise emissions and vibration characteristics. These qualities are inherent in the design of the new V12 unit: the V-angle of 60 degrees balances inertia forces and moments at source, without the need for special balancer shafts.
Cylinder head: rapid warm-up of catalytic converters thanks to three-valve technology
A camshaft in each of the two banks of cylinders controls the three valves per cylinder via low-friction roller-type cam followers. Each valve has a cam follower and is adjusted hydraulically.
The three-valve technology reduces thermal losses at the exhaust stage and speeds catalytic converter warm-up after a cold start. In conjunction with two large ceramic catalytic converters positioned close to the engine this has a decisive influence on ensuring that the new V12 reliably complies with the strict EU-4 limits. Emissions are controlled by two catalytic converters which are arranged close to the engine and which contain two ceramic monoliths each.
Turbochargers: bi-turbo system with two water-cooled intercoolers
The space-saving positioning of the twin turbocharger turbines in the exhaust manifold maximises their efficiency. A wastegate control system enables the flow of exhaust gases to the turbines to be matched to the current operating point of the engine. Wastegate valves are integrated into each turbocharger and operate electropneumatically, receiving their commands from the engine control unit.
The compressed air flows through two engine-mounted water-cooled intercoolers located on the cylinder head covers. Depending on the engine load the air is cooled here by up to 100 degrees Celsius, so that its temperature and density are optimised for the combustion process.
The water-intercoolers are integrated in a special low-temperature circuit. A demand-controlled, electric circulation pump transfers the heat between the water-intercoolers and the low-temperature cooler located in front of the engine which passes the heat from the water to the cooling air.
Ignition: AC system with constant ionic current measurement
A powerful microprocessor controls all the engine functions, making use of various additional sensor data to control the two turbochargers:
• Pressure and temperature sensors in the charge air distributor are used to calculate the intake air mass.
• A sensor in front of the throttle valve actuator registers the charge pressure.
• Sensors upstream and downstream of the air filter monitor the pressure on the clean air side so that the speed of the turbochargers can always be adjusted to suit the situation.
In addition, the engine computer controls an advanced alternating-current twin-spark ignition system whose outstanding feature is constant ionic current measurement at the spark plugs. This recognises any misfires and therefore has a major role in protecting the catalytic converters -- should the ionic current fall below a certain value the fuel injection for the cylinder concerned is automatically interrupted at once. Ionic current measurement is supplemented with torsional vibration analysis at the crankshaft. The combination of both control signals in this way not only results in an unprecedented degree of accuracy in the detection of misfires, but also does so across the entire load and speed range of a twelve-cylinder engine for the very first time.
2004 Mercedes-Benz SLK 55 AMG
(from DaimlerChrysler Press Release) One of the most exciting and successful sports cars is now ready for Round Two: Mercedes-Benz unveils its new SLK-Class.
More attractive, more powerful and sportier than its predecessor, this appealing two-seater will be celebrating its European market launch in March 2004. The new model offers a choice of three new engines with a performance range extending from 120 kW/163 hp to 265 kW/360 hp. This includes – for the first time in this vehicle class - an eight-cylinder supplied by Mercedes-AMG. The SLK 350 is powered by a new 200 kW/272 hp V6 engine delivering dynamic driving pleasure.
The second generation of this two-seater again captivates the eye with its sophisticated design featuring details reminiscent of Formula motor racing. This quality enables the SLK to uphold its reputation as a trendsetter and a tech-nology leader among the sports cars in this class. A further development of its vario-roof transforms this roadster into a coupй in just 22 seconds. The range of standard equipment also includes head-thorax sidebags, adaptive front air-bags and two-stage belt force limiters. Mercedes engineers have added even more sports refinement to the suspension, steering and manual transmission.
As a global first, Mercedes-Benz is offering the AIRSCARF neck-level heating system. This delivers a flow of warm air from the headrests at the touch of a button, thereby enabling SLK occupants to keep the roof down even when there is a chill in the air. This extends the top-down driving season to the full calendar year. Automatic climate control, bi-xenon headlamps with cornering light, COMAND and the unique 7G-TRONIC 7-speed automatic transmission add to the technological innovations which can now be supplied as options to the SLK-Class for the first time.
The new Mercedes roadster is now taking the place of its predecessor, a car which has delighted more than 308,000 owners since it first appeared in the autumn of 1996. Worldwide, this model holds the number one position in this market segment and has already established itself as a symbol for the new, dynamic brand image of Mercedes-Benz.
The design and technology employed in this second generation of the SLK-Class place even greater emphasis on sports performance. With more powerful engines, redesigned suspension, direct steering feel and a responsive six-speed manual shift system, the new model offers an even more athletic driving experience than ever before. The body size has grown by 72 mm in length and 65 mm in width, affording driver and passenger more space and even higher standards of comfort than the previous model.
Design: sports dynamics with designer features from Formula motor racing
From an initial glance, the design of this car reflects the sporty and altogether more powerful character of the new SLK-Class. A long bonnet, steeply raked windscreen, wide doors and short boot are the typical characteristics of a roadster and the new SLK underlines these even more emphatically than its predecessor. The extra 30 millimetres on the wheelbase, the distinctive arrow-like tapering at the front and rear and the wedge-shaped silhouette all contribute to this impression.
With attractive geometry details like the strikingly sharp nose section, special fins on the radiator grille and the twin exhaust system reminiscent of a racing car, the design of the new SLK recalls the fact that this two-seater is the child of a company with a long and illustrious tradition of sports car production.
The interior has also been completely redesigned and substantially upgraded with a careful choice of materials. The design concept is characterised by switches, push-buttons and decorative elements with silver-coloured surfaces, creating a sharp contrast with the black surfaces of the instrument panel. Customers who opt for a leather interior can select from a range of six colours to create their personal choice of interior look.
Body: best in its class for aerodynamics and luggage compartment volume
The beautifully shaped body of the new SLK also stands out for its technical merits: no other roadster in this class matches its superb Cd value (0.32), its exceptional standards of body strength, an equivalent fuel tank capacity (70 litres) or a comparable size of luggage compartment (300 litres when vario-roof is closed).
The innovative vario-roof with which the Mercedes sports car set new trends back in 1996 has been further improved by the engineers at the Sindelfingen plant and its technology has been honed. It opens and closes faster than ever before and thanks to a pivoting rear window it now takes up even less space in the luggage compartment. When the vario-roof is open, the luggage compartment capacity is 208 litres (applying the VDA measurement method) – this is 63 litres more than that of the predecessor model. For the first time ever, as an optional feature available on request, the vario-roof can also be actuated using the remote control on the vehicle key.
Safety: newly developed protection system with adaptive airbags
An ultramodern design procedure, a 40 % increase in the use of high-tensile steel alloys and many other additional measures allow the new SLK-Class to surpass the high safety standards set by its predecessor. The occupant protection systems respond to the prevailing situation: for the first time, Mercedes-Benz is using adaptive airbags in this model range, which deploy in two stages depending on the severity of the accident.
The belt force limiters, now standard equipment, also function in two stages and adjust to the severity of the accident. In instances of side impact, recently developed head-thorax airbags spring into action and protect the passenger’s head and upper body. A special sensor also triggers the side airbags and both belt tensioners in the event of the vehicle rolling over. Robust steel tubes in the A-pillars and solid roll-over bars behind the seats offer additional protection in accidents of this kind.
Engines: Up to 25 more performance with reduced fuel consumption
The range of engines available with the new SLK-Class is also unique for this market sector. Mercedes-Benz is the first carmaker in this segment to respond with an eight-cylinder engine to the wishes of performance-minded car drivers. The new SLK 55 AMG now sets a new benchmark in terms of power (265 kW/360 hp), torque (510 newton metres) and acceleration (0-100 km/h: 4.9 seconds). The V8 power unit is twinned as standard with the recently developed 7G-TRONIC seven-speed automatic transmission controlled by the driver using gearshift buttons on the steering wheel.
Mercedes-Benz has developed a new six-cylinder engine with around 25 percent more power (200 kW/272 hp) and 13 percent more torque (350 newton metres) for the SLK 350. The four-valve engine is one of the most powerful V6 units in its displacement class and its sporting character can be clearly distinguished by its powerful, vibrant engine note.
Maximum torque is available from an engine speed of just 2400 rpm and remains constant across a wide rev band extending up to 5000 rpm. This allows the car to be accelerated hard and permits rapid bursts of power. From a standing start, the SLK 350 reaches 100 km/h in just 5.6 seconds (with the 7G-TRONIC: 5.5 seconds) and accelerates from 60 to 120 km/h in 8.7 seconds (with the 7G-TRONIC: 5.1 seconds).
This is the first time that Mercedes-Benz has ever produced a V6 engine with variable camshaft control on intake and exhaust sides. The outcome is enhanced performance and torque combined with improved fuel economy. A two-stage intake manifold, “tumble” flaps in the intake ducts and an intelligent heat management system add to the technical distinguishing features of this new six-cylinder engine. When combined with the option of a seven-speed automatic transmission, the new SLK 350 only consumes a meagre 9.9 litres of Super grade fuel over a distance of 100 kilometres (NEDC total consumption figures) and therefore, despite a significant increase in performance figures, still manages to be some five percent more fuel-efficient than the previous SLK six-cylinder engine with a five-speed automatic transmission.
The 120 kW/163 hp engine in the SLK 200 KOMPRESSOR is also celebrating a premiere status in this range of Mercedes models. This is one of the new generation of four-cylinder engines from Mercedes-Benz featuring the unique TWINPULSE system which offers further advances in terms of performance, torque, smoothness and fuel economy. The TWINPULSE system combines a range of different technologies such as a compressor, balancer shafts, charge-air cooling, variable camshaft adjustment and four-valve technology. This high-tech package makes the new SLK 200 KOMPRESSOR eight percent more fuel-efficient than its equally powerful predecessor. The NEDC overall fuel consumption rating is just 8.7 litres of fuel over a distance of 100 kilometres.
As standard equipment, the SLK 200 KOMPRESSOR and SLK 350 are going to the starting grid with a six-speed transmission equipped with short, fast shift lever strokes and high levels of shift precision. As an option, the four-cylinder engine can be twinned with the tried and tested five-speed automatic transmission while the new six-cylinder can be paired up with the 7G-TRONIC seven-speed automatic transmis-sion. To reflect the dynamic character of the new SLK-Class, drivers can operate both automatic transmissions using gearshift buttons mounted on the steering wheel (as an optional extra) to select the desired ratio.
The distinguishing features of the sports-tuned suspension are the new design of three-link front axle, the rack-and-pinion steering unit and an even more powerful braking system than the previous model. Mercedes engineers have modified many details of the multi-link independent rear suspension unit and have adapted it to suit the increased track width of this new model. Depending on the choice of model, standard equipment in the new SLK-Class can include 16, 17 or even 18-inch alloy wheels. Low-slung sports suspension is also available as an option.
Comfort: AIRSCARF – a world first for even greater top-down driving pleasure
Longer and more often is the clear message from the new Mercedes-Benz SLK-Class to fans of top-down driving. AIRSCARF is a world first which allows drivers to lower the vario-roof even when there is a real chill in the air. Owners can now enjoy the true roadster experience more frequently than ever before. AIRSCARF is an innovative heating system located in the seat headrests: at the touch of a button, temperature-controlled air flows out of special vents in the headrests to keep the shoulders, neck and heads of SLK occupants warm on the road – acting just like an invisible scarf.
This new development is a unique option in the open-top car market. It operates in three stages and is equipped with an electronic control unit. It controls head-level heating to suit ambient conditions – depending on roadspeed and temperature - and adapts the fan speed continuously to ensure that the best possible distribution of hot air is delivered in any given situation.
The THERMATIC system represents a further innovation for perfect in-car climate control and is standard equipment on the SLK 350 and the SLK 55 AMG. For even more demanding car drivers, Mercedes-Benz has developed the THERMOTRONIC luxury climate control system, equipped with solar and pollutant sensors.
To keep SLK driver and passenger entertained and informed, optional equipment includes the Audio 20 CD stereo car radio, the Audio 50 APS with integrated colour display and a navigation system or COMAND APS, which features a DVD/CD player, colour display and separate DVD drive for the navigation system. Another option is the surround sound system with eleven speakers and a 380 Watt amplifier for that ultimate acoustic experience.
2004 Mercedes-Benz SLK
The second generation of one of the most exciting and successful sports cars on the market is ready to hit the streets: Mercedes-Benz presents the new SLK-Class.
Even more alluring, more powerful and sportier than ever, the beguiling two-seater is due to celebrate its European market premiere in March 2004. Three dif-ferent engine variants are available for the new car, developing from 120 kW/163 hp to 265 kW/360 hp. The range includes – for the first time in this vehicle class – an eight-cylinder power unit from Mercedes-AMG. The V6 engine in the SLK 350, meanwhile, develops 200 kW/272 hp and delivers impressively dynamic driving pleasure.
The second generation of the Mercedes compact two-seater also boasts an exquisite overall design, several details of which take their cue from Formula 1. The SLK thus remains true to its reputation as a trendsetter and technological leader in this category of sports cars. The further developed varioroof, which transforms the roadster into a coupй in just 22 seconds, is joined on the list of standard equipment by head/thorax sidebags, adaptive front airbags and two-stage belt force limiters. The car’s chassis, steering and manual transmission have been given an even sportier edge.
Plus, Mercedes-Benz is presenting a world first, in the shape of the innovative AIRSCARF neck-level heating system. At the touch of a button AIRSCARF generates warm air, which flows out from the head restraints. This allows the SLK passengers to keep the roof down even when the outside temperatures drop and to enjoy the open-top roadster experience the whole year round. Automatic climate control, bi-xenon headlamps with cornering light function, COMAND APS and the unique seven-speed automatic transmission 7G-TRONIC are among the other technical innovations offered as options for the first time in the SLK-Class. Ex-factory prices for the SLK-Class range from 33,524 to 63,974 euros.
The new Mercedes Roadster replaces a successful first-generation model enjoyed by over 308,000 delighted owners since autumn 1996. The global number one in its market segment, it serves as a symbol for the new, dynamic brand image of Mercedes-Benz.
The second generation of the SLK-Class has an even sportier edge in terms of both its design and engineering and, with its powerful engines, newly developed chassis, direct steering and precise six-speed manual transmission, delivers an even more agile driving experience. The body is 72 millimetres longer and 65 millimetres wider than the outgoing model, providing the SLK's passengers with more space and even greater comfort.
Design: sporty dynamism, with styling elements inspired by motorsport
The design of the car reflects the sporty and powerful character of the new SLK-Class. A long bonnet, flat windscreen, wide doors and a short rear represent typical roadster characteristics given extra emphasis by the new SLK. This extra forcefulness is underpinned by a 30-millimetre longer wheelbase, clear tapering of the front and rear ends and a wedge-shape silhouette.
A range of captivating details inspired by racing cars – such as the arrow-shaped nose, wing profiles in the radiator grille and the twin-tailpipe system – underline the origins of the SLK in a company which can point to an illustrious sports-car tradition.
The interior has also been completely redesigned and upgraded through the use of carefully selected materials. The design concept is distinguished by switches, buttons and trim elements with silver-coloured surfaces, which form a striking contrast to the dark tones of the dashboard. Plus, customers can choose from a range of six shades for the leather trim, or any one of twelve designo appointment colours.
The beautifully sculptured bodywork is also an achievement in terms of its technical prowess. The Cd value (0.32) is a good example, as are the rigidity of the body and the fuel tank capacity (70 litres). The Sindelfingen engineers have further optimised and perfected the technology behind the innovative varioroof, which marked the SLK out as a trendsetter on its arrival in 1996. The roof now opens and closes even more quickly and takes up even less space in the boot – thanks to the pivoting rear window. With the varioroof open, boot capacity stands at 208 litres according to the VDA method - 63 litres more than in the outgoing model. A further new feature now makes it possible to operate the varioroof by a remote control function in the car key (optional).
Safety: newly developed protection system with adaptive airbags
State-of-the-art construction processes, the increasingly large proportion of high-strength steel alloys (40 percent) and a host of other measures besides allow the new SLK-Class to leave the outgoing model in its slipstream. The occupant protection systems adjust their reactions according to the situation in hand. For example, adaptive airbags – which inflate in two stages in response to the severity of the accident – are making their debut in this model series.
The standard-fitted belt force limiters also work through two stages and adapt to the severity of the accident. In the event of a side impact, newly developed head/thorax airbags inflate to protect the head and upper body of the passengers. A special sensor also triggers the side airbags and both belt tensioners if the car rolls over. Robust steel tubes in the A-pillars and solid roll-over bars behind the seats offer additional protection in this type of accident.
Engines: up to 25 percent more power coupled with reduced fuel consumption
The range of engines available for the SLK-Class is also quite unique in this market segment. Here, Mercedes-Benz is the first manufacturer to respond to the desires of drivers with more sporting ambitions by adding an eight-cylinder powerplant to the mix. The V8 unit gives the SLK 55 AMG class-leading output (265 kW/360 hp), torque (510 Newton metres) and acceleration (0-100 km/h: 4.9 seconds) figures. The top-of-the-line engine is linked up as standard with the newly developed seven-speed automatic transmission 7G-TRONIC, which the driver can choose to operate using steering-wheel gearshift buttons.
For the SLK 350, meanwhile, Mercedes-Benz has developed a new six-cylinder engine with around 25 percent more power (200 kW/272 hp) and 13 percent extra torque (350 Newton metres ). The four-valve unit is one of the most powerful V6 engines in its displacement class and reinforces its sporting credentials with a pleasing, full-throated sound.
Peak torque is available as low down as 2400 rpm and remains constant up to 5000 rpm. This provides the key to powerful acceleration and impressive mid-range sprints. The SLK 350 reaches 100 km/h from a standstill in just 5.6 seconds (with 7G-TRONIC: 5.5 seconds) and accelerates from 60 to 120 km/h in 8.7 seconds (with 7G-TRONIC: 5.1 seconds).
For the first time, Mercedes-Benz is using variable intake and exhaust camshaft adjustment in the V6 engine. This boosts output and torque, whilst also helping to save fuel. A second intake manifold, tumble flaps in the intake ducts and intelligent heat management are further technical highlights of the new six-cylinder unit. When fitted with the seven-speed automatic transmission, the new SLK 350 burns 10.1 litres of premium unleaded petrol per 100 km (NEDC combined), making it some three percent more economical than the outgoing SLK six-cylinder variant with five-speed automatic transmission, despite its significantly deeper power reserves.
The 120-kW/163-hp engine under the bonnet of the SLK 200 KOMPRESSOR is also celebrating its premiere in this Mercedes model family. The new arrival is a member of the unique TWINPULSE generation of four-cylinder engines from Mercedes-Benz, which offer further advances in terms of output, torque, smoothness and fuel consumption. The TWINPULSE system brings together various technologies, such as a supercharger, balancer shafts, an intercooler, variably adjustable camshafts and four-valve technology. This high-tech package allows the SLK 200 KOMPRESSOR to burn eight percent less fuel than the outgoing engine with the same output. NEDC combined consumption stands at 8.7 litres per 100 kilometres.
The SLK 200 KOMPRESSOR and SLK 350 are fitted as standard with a six-speed manual transmission which stands out with its short and fast shift travel and impressive precision. The proven five-speed automatic transmission is available as an option for the four-cylinder engine, whilst customers can order the new V6 model with the seven-speed automatic transmission 7G-TRONIC. In keeping with the dynamic and agile character of the SLK-Class, the driver can also operate either automatic transmission using buttons on the steering wheel (optional) and select the gears manually.
The chassis for the new SLK has a sporty set-up and differs from the outgoing model with its newly developed three-link front suspension, rack-and-pinion steering and an even more effective braking system. Mercedes engineers have carried out detailed modifications to the multi-link independent rear suspension and adapted it to the larger track width. The new SLK-Class comes as standard with 16, 17 or 18-inch light-alloy wheels, depending on the model. Sports suspension with a lowered body is available as an option.
Comfort: new AIRSCARF system ensures even greater open-air driving pleasure
The new Mercedes-Benz SLK-Class is an open-top motoring enthusiast's ticket to enjoying themselves more frequently, more of the time. Making its global debut, the AIRSCARF system allows you to open the varioroof in cooler weather and thus enjoy the roadster experience more often. AIRSCARF is an innovative heating system located in the seat backrests. At the touch of a button, heated air is directed out of special vents in the head restraints and acts like an invisible scarf to warm up the head and neck of the SLK passengers when out on the road.
Available as an option, this new development is unique to the new SLK. It works in three stages and is fitted with an electronic control unit which adjusts the neck-level heating according to the speed of the car and the outside temperature and regulates the blower speed in order to achieve optimum warm-air distribution in any situation.
The optional air conditioning system THERMATIC (standard in the SLK 350 and SLK 55 AMG) is another innovation designed to ensure the perfect on-board climate. For even more discerning customers, Mercedes-Benz has developed the luxury automatic climate control system THERMOTRONIC with built–in sun and pollutant sensors.
Entertainment and information are delivered to SLK passengers through the Audio 20 CD stereo system, Audio 50 APS with integrated colour display and navigation system or COMAND APS, which includes a DVD/CD player, colour screen and separate DVD drive for the navigation function. A surround-sound system with eleven speakers and 380-watt output is also available as an option in order to further optimise the in-car audio experience.
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