This 7-speed dual-clutch gearbox developed by the Mercedes-Benz independent. Torque has been the bottleneck of the development of dual-clutch gearbox, but from the perspective of the existing technology, as long as do not deliberately pursue the limit, dual-clutch gearbox or has a positive effect. The 7-speed dual-clutch gearbox uses a wet clutch from a factory in Stuttgart, Germany, with a maximum torque of 350 Nm.