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:

    Safety switch for the rear
    Press the button on the driver's door if children are being transported in the rear. This locks the rear window switches so that the windows cannot be operated from the rear: safety switch. ...

    Engine specifications
    The rated power outputs are established on the basis of fuel grade AKI 91. ...

    BMW X5 xDrive35d: Maintaining the Benchmark with BMW Advanced Diesel Technology.
    The BMW Advanced Diesel X5 xDrive35d was introduced to the United States as a 2009 model, and despite increased competition remains the fastest, most fuel efficient diesel-powered vehicle in its c ...