BMW 5 Series: Close the windows and glass 
sunroof - Saving fuel - Driving tips - BMW 5 Series Owners ManualsBMW 5 Series: Close the windows and glass sunroof

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

    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. ...

    Check the tire inflation pressure regularly
    Check and, if necessary, correct the tire inflation pressure at least twice a month and before starting on a long trip. Low tire inflation pressure increases rolling resistance and thus raises ...

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    Position of the steering wheel when the EASY-ENTRY/EXIT feature is activ
    The steering wheel swings upwards when you: Rremove the SmartKey from the ignition lock Ropen the driver's door and KEYLESS-GO is in position 1 Ropen the driver's door and the SmartKey is i ...

    Front fog light switch (if equipped)
    The front fog lights operate under the following conditions. ● when the light switch is in the УФ position ● when the light switch is in the УAUTOФ position and the headlights turn o ...

    Supplemental air bag warning light
    The supplemental air bag warning light, displaying in the instrument panel, monitors the circuits for the air bag systems, pretensioners and all related wiring. When the ignition is placed in t ...