See also:

Head airbags
In a lateral impact, the head airbag supports the head. ...

Lateral ventilation
Thumbwheel for opening and closing the vents continuously, arrow 1. Lever for changing the air flow direction, arrow 2. ...

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