See also:

The concept
The following can be displayed or operated using the buttons and the thumbwheel on the steering wheel and the display in the instrument cluster: ▷ Current audio source. ▷ Programs ...

Tire size
Example: 255/55 R 19 107 V 255: nominal width in mm 55: aspect ratio in % R: radial tire code 19: rim diameter in inches 107: load rating, not for ZR tires V: speed rating, before the R on ZR ti ...

Deleting all stored programs
Press both outer memory buttons 1 for approx. 20 seconds until the LED flashes rapidly. All stored programs are deleted. The programs cannot be deleted individually. ...