See also:

Opening the tone settings in the Options menu*
1. "CD/Multimedia" or "Radio" 2. If necessary, select additional entries, for example, "FM" or "CD/DVD". 3. Open "Options". 4. "Tone" ...

Deleting the button assignments
1. Press buttons 1 and 8 simultaneously for approx. five seconds. 2. "OK" ...

Deactivating the system
▷ Press the lever upward or downward twice, arrow 3. ▷ Switch off the ignition. The stored speed is cleared. ...