The ultimate Roadster power units

SLK stands for responsiveness and agility of the highest degree. And if you move fast, you must be able to shift fast, too. That’s why the power of the different engines is transferred by transmissions which are precisely attuned to the temperament of each model. You can choose between the standard 6-speed manual transmission and an optional 5-speed automatic transmission for the SLK 200 KOMPRESSOR. For those who prefer one of the 6-cylinder engines, 7G-TRONIC, the 7-speed automatic transmission, is available as an option. In the SLK 55 AMG this transmission is standard. The optional 7G-TRONIC Sport with steering-wheel gearshift paddles ensures even swifter gearshifts. These steering-wheel gearshift paddles can be ordered as optional equipment for all automatic transmissions, except for the SLK 55 AMG, where they are standard.[1]


With its seven speeds, the 7G-TRONIC automatic transmission adapts marvellously to every driving situation. The seven ratios ensure that the jumps in rev speed from one gear to another are small, resulting in smooth gearshifts and a lower average rev speed level. In addition, it offers the possibility of multiple downshifts for particularly fast acceleration at all times.