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:
Diagnosis OBD
On the driver's side is an OBD socket for checking components relevant to the
composition of the vehicle's emissions. ...
Requirements
Via the Control Display, set a language that is
also supported by the voice activation system
so that the spoken commands can be identified.
Set the language. ...
Deleting the button assignments
1. Press buttons 1 and 8 simultaneously for
approx. five seconds.
2. "OK" ...