How to Adjust a Car Compass in a Mercedes Benz

1. Turn on your engine. Make sure the radio and climate control are off. Make sure all of the doors are closed.
2. Press and hold the button on the bottom side of your electronic compass mirror. Hold this button for approximately six seconds, until 'C' appears in the compass display.
3. Drive your Mercedes in a full circle without applying the accelerator pedal (let it coast at 3 to 5 mph).
4. Continue driving in a full circle (it may take several circles) until the compass display changes from 'C' to the proper direction.