The concept
The parking brake is primarily intended to prevent the vehicle from rolling while parked; it brakes the rear wheels.
See also:
Tire inflation pressures X5 xDrive50i with two rows of seats
...
Fuses
Never attempt to repair a blown fuse and do
not replace a defective fuse with a substitute of another color or amperage rating;
otherwise, this could lead to a circuit overload, ultimately result ...
Close the windows and glass sunroof
Driving with the glass sunroof and windows
open results in increased air resistance and
raises fuel consumption. ...