The PDK (its full name is Porsche Doppelkupplungsgetriebe, or double clutch gearbox) uses two wet clutches to shift its seven forward gears with minimal interruption in the flow of power to the wheels. And though it can make all the gear changes without any help from the driver, mechanically it’s a manual transmission. It does not connect to the engine through the fluid coupling known as a torque converter that is used by conventional automatics.
Such distinctions aside, say “auf wiedersehen” to the clutch pedal.
Source: New York Times