BMW 5 Series: Remove attached parts 
following use - Saving fuel - Driving tips - BMW 5 Series Owners ManualsBMW 5 Series: Remove attached parts following use

Remove auxiliary mirrors, roof or rear luggage racks which are no longer required following use.

Attached parts on the vehicle impair the aerodynamics and increase the fuel consumption.

    Remove unnecessary cargo
    Additional weight increases fuel consumption. ...

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

    See also:

    Engine number
    The engine number is stamped on the engine block as shown in the drawing. ...

    Automatic deactivation of the front passenger airbags
    The system determines whether the front passenger seat is occupied by measuring the resistance of the human body. The front, knee, and side airbag on the front passenger side are activated or d ...

    Towing Tips
    Before setting out on a trip, practice turning, stopping, and backing the trailer in an area located away from heavy traffic. Make sure all trailer and vehicle lights are working properly — i ...