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

See also:
ConnectedDrive or BMW Assist
...
Opening
Press the switch to the resistance
point.
The window opens while the switch is held.
Press the switch beyond the resistance
point.
The window opens automatically.
Pressing again stop ...
Status display
The current status of the Flat Tire Monitor can
be displayed on the Control Display, e.g.,
whether or not the FTM is active.
1. "Vehicle Info"
2. "Vehicle status"
3. " ...
