See also:

Front
Active seat ventilation 1. Seat heating 2. Active seat ventilation Press button 1 or 2 once depending on the temperature or ventilation position. The LED in the respective button lights up. ...

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

Enabling operation in the rear
Only possible via the iDrive in the front. 1. "Settings" 2. "Allow rear control" 3. Select the desired priority. ...