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:

    Tire specification and pressure label
     Tire specification and pressure label The tires supplied on your new vehicle are chosen to provide the best performance for normal driving. The tire label located on the driver's sid ...

    Ignition Positions (Keyless Access)
    Ignition Positions (Keyless Access) The vehicle has an electronic keyless ignition with pushbutton start. Pressing the button cycles it through three modes, ACC/ACCESSORY, ON/RUN/START, an ...

    Cooling system
    WARNING Never attempt to remove the radiator cap until the engine has been shut off and has cooled down completely. Since the coolant is under pressure, you may suffer serious burns from a spray ...