How to Reset the Service Message on an E320

1. Turn the ignition switch to 'On' without starting the engine.
2. Press and release the '0' button on the left side of the instrument cluster twice immediately after turning the ignition on.
3. Turn the ignition off.
4. Press and hold the '0' button.
5. Turn the ignition on.
6. Release the '0' button after the service message resets. Turn the ignition off.