The Automatic Start/Stop function makes sure that fuel is only used when the car is actually driving. While waiting at traffic lights or in stop-and-go traffic, the Automatic Start/Stop function saves fuel by switching off the engine as soon as the car is idle and the foot has been taken off the clutch (manual transmission), or when the driver brakes to a complete standstill (Steptronic transmission). A signal in the Info Display indicates that the Automatic Stop/Start function is active. As soon as the driver shifts into gear (manual transmission) or takes his foot off the brake (Steptronic transmission), the engine immediately switches itself back on.The Automatic Start/Stop function never compromises driving comfort and safety, as it remains inactive if the engine has not reached its ideal running temperature, the interior has not yet been sufficiently heated/cooled, if the battery level is too low or if you are turning the steering wheel. A central control unit restarts the engine if required, even when the car is at a standstill – for example, if the car starts to roll forward or if the windscreen becomes foggy. The Automatic Start/Stop function can be switched off at any time with the push of a button.