See also:

Deactivating HDC
Press the button again and the LED goes out. HDC is automatically deactivated above approx. 37 mph/60 km/h. ...

The concept
The automatic engine start-stop function helps save fuel. The system switches off the engine during a stop, e. g., in a traffic congestion or at traffic lights. The ignition remains switched on. ...

Operating from the inside
Via the button for the central locking system. If the vehicle has been locked from inside, the fuel filler flap remains unlocked. If an accident of a certain severity occurs, the central locki ...