See also:

Long-term vehicle storage
Your service center can advise you on what to consider when storing the vehicle for longer than three months. ...

Charging the battery
In the vehicle, only charge the battery via the terminals in the engine compartment, with the engine switched off. ...

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