See also:

Malfunction
Comfort Access may not function properly if it experiences interference from external sources such as mobile phones, metal objects, overhead power lines, transmission towers, etc. In this case, ...

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

BMW EfficientDynamics: More power, less fuel consumption
With high-performance engines, superior suspension technology and an extremely torsion-resistant body, the new BMW 3-Series is building on its position as the sportiest sedan in its segment. It is ...