See also:

Sound output
Switching on/off When the ignition is switched off: press ON/OFF button on the radio. Muting When the ignition is switched on or the engine is running: press the ON/OFF button on the radio. ...

Manual transmission
Switching off the engine 1. With the vehicle at a standstill, press the Start/Stop button. 2. Shift into first gear or reverse. 3. Set the parking brake. ...

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. ...