1. Turn the ignition key to the "On" position, but do not start the engine.
2. Press and hold the trip reset button on the instrument cluster.
3. While holding the trip reset button, turn the ignition key to the "Off" position.
4. Continue to hold the trip reset button for approximately 10 seconds.
5. The service indicator will reset to zero.
Note: If the service indicator does not reset, you may need to take your vehicle to a Mercedes-Benz dealership or qualified repair shop to have it reset.