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:

    Carbon Monoxide Hazard
    Your vehicle’s exhaust contains carbon monoxide gas. Carbon monoxide should not enter the vehicle in normal driving if you maintain your vehicle properly and follow the information on this ...

    Front Seat Manual Adjustments
    See pages for important safety information and warnings about how to properly position the seats and seatbacks. Make all seat adjustments before you start driving. To adjust the seat forward ...

    Ventilation
    To force outside air through the instrument panel outlets: 1. Set the air inlet selection button to the OFF position. 2. Press the “” button. 3. Set the temperature control dial all the way lef ...