The new Mercedes-Benz SL 400: Start-up with new vigour

Stuttgart – The SL Roadster family from Mercedes-Benz is raring to go wîth a new engine. The SL 400 is now endowed wîth a six-cylinder biturbo drive system. Despite half a litre less displacement the output has risen by 20 kW (27 hp). Plus there are 110 newton metres more torque at its disposal. The price of the SL 400 starts from 97,282.50 euros (for the German market incl. 19% VAT).

As an automotive icon the Mercedes-Benz SL blends accomplished motoring at the highest level wîth exquisite style. Manufactured virtually completely from aluminium, the roadster also sets the standards in the category of luxurious roadsters wîth its numerous technical innovations. Not forgetting that the SL is entirely suitable for everyday use thanks to its retractable vario-roof. This makes it the all-rounder amongst sports cars.

In contrast to its predecessor, the SL 400 is not fitted wîth a naturally aspirated engine. Instead it boasts a six-cylinder unit wîth two turbochargers. Although its displacement has been reduced to three litres, the biturbo drive system develops a high full-load output potential wîth a charge pressure of 1.8 bar, and facilitates an extremely high torque of 480 newton metres at low engine speeds. It achieves 20 kW more than the SL 350. Its torque increases by 110 newton metres and is available in the engine speed range of 1600 to 4000 rpm. Plus the efficient six-cylinder meets the EÚ6 emissions standard.

Like all BlueDIRECT petrol engines the biturbo engine in the new SL 400 also works wîth a direct injection system wîth spray-guided combustion, which Mercedes-Benz was the first car manufacturer to offer in series production. The system pressure is up to 200 bar, the pressure being variably optimised according to the engine's mapping. Piezo injectors enable optimal mixture formation wîth up to five injections per power stroke. The third-generation direct injection is supplemented by rapid multi-spark ignition, MSI. How it works: Following the first spark discharge and a brief combustion period, the coil is recharged very rapidly and a further spark is discharged. The MSI system enables up to four sparks to be discharged in succession within one millisecond, creating a plasma wîth a larger spatial expansion than conventional ignition.

The rapid multi-spark ignition can be controlled to vary both the timing of the sparks and the combustion period to suit the relevant operating point. This provides scope for optimising the centre of combustion and improved residual gas compatibility. The result of this is excellent utilisation of the fuel wîth minimum emissions.

Vital Stats
Engine : 3.0 L., 6-cylinder
Power: 329 hp
Torque: 354 ft-lbs

7-speed Automatic
The SL 400 also offers two extraordinary innovations as standard: the unique Frontbass system developed by Mercedes-Benz transforms the luxury sports car into a concert hall, when the top is up and down, and the highly efficient MAGIC VISION CONTROL wipe/wash system takes water from the wiper blade to the windscreen as required and irrespective of the direction of wipe.

Source - Mercedes-Benz
 
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