The AMG SPEEDSHIFT MCT 7-speed sports transmission, used exclusively in the new Mercedes-Benz SL 63 AMG receive “Best of what’s new Awards” from the editors of Popular Science magazine.
Equipped with seven gears, four driving modes, a double-declutch function and a RACE START function, the AMG SPEEDSHIFT MCT 7-speed sports transmission excels with previously unattained flexibility. MCT stands for Multi-Clutch Technology, and indicates that gearchanges are executed solely by the clutch components.
No interruption in tractive power and four driving modes
The centrepiece of the AMG SPEEDSHIFT MCT 7-speed sports transmission is the wet start-off clutch, which operates in a sump and replaces the previous torque converter. Thanks to its low rotational inertia, this transmission is extremely responsive and dynamic, with movements of the accelerator immediately translated into motive power. Equipped with four driving modes, the transmission shifts the gears with no interruption in tractive power and provides tailor-made shift strategies for maximum driving pleasure. In “C” mode the gearchanges are comfort-oriented, with “soft” accelerator mapping for extremely smooth progress. In “S” mode the engine and transmission respond much more immediately, with more revs in each gear and faster downshifts. Gearshifts are also around 20 percent faster than in “C”. Changing to driving mode “S+” shortens this time by a further 20 percent, while “M” provides the most sporty mode of all: now the 6.3-litre AMGV8-engine responds more sharply, and the transmission shifts the gears 10 percent faster – corresponding to a 50 reduction versus “C” mode. In “M” mode the gearchanges take only 100 milliseconds.