See also:

Engaging the transmission position
Transmission position P can only be disengaged if the engine is running and the brake pedal is pressed. With the vehicle stationary, press on the brake pedal before shifting out of P or ...

Switching on/off manually
Press the button. ...

USB audio interface/mobile phone audio interface
At a glance It is possible to connect external audio devices. They can be operated via iDrive. The sound is output on the vehicle loudspeakers Connectors for external devices ▷ Connection ...