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. ...

Software Update
The vehicle supports various external devices depending on the current software version. With a software update, the vehicle can support new cell phones* or new external devices*. The updating ...