Auto start/stop switches off the engine when the driving speed falls below 4 mph, such as when you are approaching a red light. As soon as you release the clutch or depress the accelerator pedal, the engine restarts – swiftly and smoothly.
In conjunction with Porsche Doppelkupplung (PDK), a coasting function becomes available when the situation allows. The engine is decoupled from the transmission to avoid deceleration caused by engine braking. This way, optimum use is made of the vehicle’s momentum, enabling it to coast for longer distances.