See also:

Switching the system on/off
Switching off At the lowest fan speed, press the left side of the button on the driver's side. Switching on Press any button. ...

Audio playback
Selecting the track using the button Press the button repeatedly until the desired track is played. Selecting the track using the iDrive Audio CDs Select the desired track to begin playback. ...

Charging the battery
In the vehicle, only charge the battery via the terminals, in the engine compartment with the engine off. ...