Mercedes-Benz replaced the torque converter in its AMG seven speed automatic with a double-clutch assembly. Mercedes-Benz distinguishes this transmission from Audi's DSG and other double-clutch manual transmissions, pointing out that its transmission can downshift more than one gear at a time, from 7th to 4th, for example, and offers a smoother shifting experience. The transmission as four modes, Normal, Sport, Sport Plus, and Manual. At its fastest, the transmission can shift gears in 100 milliseconds. The SL63 AMG also has launch control, letting you push the gas to the floor, then launch with no wheel spin.