See also:

Closing the windows and glass sunroof/panoramic glass sunroof
Driving with the glass sunroof/panoramic glass sunroof and windows open results in increased air resistance and raises fuel consumption. ...

Tire inflation pressure values over100 mph/160 km/h
X3 28i X3 35i ...

After the ignition is switched off
The roof can still be operated for approx. 1 minute, as long as no door has been opened. ...