Switching the split screen on and off
1. 
Press the button.
2. "Split screen"
See also:
Automatic deactivation during forward travel
The system switches off when a certain driving
distance or speed is exceeded.
Switch the system back on if necessary. ...
Right-hand/left-hand steering
The digital compass is set for right-hand or lefthand
steering at the factory ...
Enabling operation in the rear
Only possible via the iDrive in the front.
1. "Settings"
2. "Allow rear control"
3. Select the desired priority.
...