Automotive Intelligence - the web for automotive professionals and car enthusiasts
February 13, 2008
The AMG SPEEDSHIFT MCT 7-speed sports transmission is an all-new, unique concept, available exclusively in the new Mercedes-Benz SL 63 AMG. It combines the best of two worlds: the sporty, direct and agile feedback of a manual transmission and the maximum convenience of an automatic transmission.
Fitted with seven speeds, four drive modes, a double-declutching and Race Start function, the AMG SPEEDSHIFT MCT 7‑speed sports transmission offers unprecedented versatility. MCT stands for Multi‑Clutch Technology and only employs clutch elements to perform gearshifts. The high-tech transmission is designed for high torque and maximum revs up to 7200 rpm. It also comes with sufficient reserves even under the highest loads thanks to its high-performance oil cooling system. An all-new, sophisticated electronic transmission control unit fully controls and monitors all processes. New AMG DRIVE UNIT with innovative Race Start function
The new AMG DRIVE UNIT is the central control unit for the AMG SPEEDSHIFT MCT 7-speed sports transmission and all driving dynamics functions. The driver can change gears either using the new AMG selector lever with its leather/ carbon-fibre finish, or by nudging the AMG steering-wheel shift paddles. On the left next to the selector lever is the electronic rotary switch to select the four drive modes including activation of the new Race Start function. Underneath are three buttons for additional functions: the first controls the ESP Ò function, the second the ABC suspension system. The third adorned with AMG lettering is used to store the selected transmission drive mode and the suspension set-up. Briefly pressing the AMG button brings up the configuration options, while holding down the button allows you to program the required set-ups.
AMG 6.3-litre V8 naturally aspirated engine with 386 kW/525 hp
The AMG 6.3-litre V8 engine teams up with the AMG SPEEDSHIFT MCT 7-speed sports transmission to form a perfect partnership for dynamic driving pleasure and outstanding performance.
The unique combination of high-revving concept and large displacement achieves the best of both worlds: high pulling power at low engine speeds coupled with exhilarating high-revving flexibility – right up to 7200 rpm.
New AMG bodystyling ensures clear differentiation
The appearance of the SL 63 AMG now gives away its exceptional status more than ever before. The new-look front apron with a more pronounced wedge shape, black-painted radiator grille, larger cooling air intakes and lower transverse fin painted in black harmonises perfectly with the redesigned front end of the SL‑Class, giving it a decidedly masculine aura. The distinctive AMG bonnet more than hints at the unique power unit underneath. Bi-xenon headlamps with their dark surrounds, and large round fog lamps set well to the side in chrome surrounds also emphasise the vehicle's width. The hot air from the additional engine oil cooler in the front wheel arch escapes through side air outlets in the front apron. New exterior mirrors featuring LED indicators with a pronounced arrow shape catch the eye as do the matt-silver-painted AMG trim panels on the front wings with “6.3 AMG” lettering.
SL 65 AMG with biturbo V12 producing 450 kW/612 hp and 1000 Newton metres
Top of the line in the exclusive 12-cylinder roadster segment is the SL 65 AMG. Its AMG 6.0-litre V12 biturbo engine produces 450 kW/612 hp with maximum torque of 1000 Newtonmetres – unrivalled figures even four years after the market launch. The SL 65 AMG accelerates from 0 to 100 km/h in just 4.2 seconds, impressive testimony to the outstanding power of the AMG V12 engine; top speed is 250 km/h (electronically limited). Power in the SL 65 AMG is transferred by the AMG SPEEDSHIFT five-speed automatic transmission with three drive modes; a multi-disc limited-slip differential with a lock factor of up to 30 percent also guarantees optimum traction.
(Feb 10, 2008)