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. ...

Safety
BMW's inflatable tubular Head Protection System includes side curtain-type airbags for the first and second rows. Front-seat side-impact airbags are installed, and rear side-impact airbags are opt ...

Brake pedal feel
When the system brakes and you also depress the brake pedal, a somewhat different braking feel results. ...