See also:

Service booklet
Perform maintenance work at the service center, and record the work in the service booklet. The entries are proof of regular maintenance. ...

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

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 ...