To calibrate the compass:
Stop the vehicle in a large, open area away from steel constructions and high-voltage power lines.
Start the engine and switch off all electrical equipment (climate system, wipers, etc.) and make sure all doors are closed.
Note
Calibration may fail or not even be initiated if electrical equipment is not turned off.
Hold the button on the bottom of the rearview mirror pressed for about 3 seconds (using e.g. a paper clip). The number of the current magnetic zone is shown.
Press the button on the underside of the mirror repeatedly until the desired magnetic zone (1–15) appears (see the map of magnetic zones).
Wait until the display again shows C, or press and hold the button on the underside of the rearview mirror for approx. 6 seconds until C is displayed.
Drive slowly in a circle at a speed of no more than 10 km/h (6 mph) until a compass direction is shown in the display. This indicates that calibration is complete. Drive in a circle two more times to fine-tune the calibration.
Vehicles with heated windshields*: If C is shown in the display when the windshield heating function is activated, perform step 6 above with the heating function on.
Repeat the above procedure as needed.