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:

    Incoming calls
    Press OK/MENU (or the thumb wheel on the steering wheel keypad) to answer a call, even if the infotainment system is currently in another mode (e.g., RADIO or MEDIA). Press EXIT to reject a call. ...

    Current and Past Models
    Technical Service Bulletins and Manuals are available for current and past model GM vehicles. ORDER TOLL FREE: 1-800-551-4123 Monday – Friday 8:00 AM – 6:00 PM Eastern Time For Credit Car ...

    Exit Lighting
    This allows selection of how long the exterior lamps stay on when leaving the vehicle and it is dark outside. Press SELECT when Exit Lighting is highlighted. Turn the Menu knob to select Of ...