See also:

Tire inflation pressure values over 100 mph/160 km/h
320i   328i 335i ...

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

General information
The glass sunroof and the sliding visor can be operated together or separately, using the same switch. The glass sunroof is operational when the ignition is switched on. Danger of pinching M ...