See also:

The concept
The parking brake is primarily intended to prevent the vehicle from rolling while parked; it brakes the rear wheels. ...

Controls
1 Change the entertainment source 2 Eject CD/DVD 3 CD/DVD drive 4 Change station/track 5 Programmable memory buttons 6 Volume, on/off ...

Opening the main menu
Press the button. The main menu is displayed. All iDrive functions can be called up via the main menu. ...