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

See also:
Tire inflation pressure X6 xDrive35i
...
Switching on/off manually
Switching on/off manually
Press the button.
▷ On: the LED lights up.
▷ Off: the LED goes out.
If Top View is displayed, switch on the backup
camera via the iDrive ...
Start/Stop button
The concept
Pressing the Start/Stop button
switches the ignition on or off and
starts the engine.
The engine starts if the brake
pedal is pressed when you press
the Start/Stop button. ...
