Close the windows and glass sunroof

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

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    Overview
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    2009 BMW 750 Review by Mike Hanley
    When a redesigned 7 Series debuted for the 2002 model year, it was one of the most controversial cars in recent history. Not only did it signal a new design direction for BMW that rubbed many peop ...

    Condensation under the parked vehicle
    When using the automatic climate control, condensation water develops that exits underneath the vehicle. Therefore, traces of condensed water under the vehicle are normal. ...