1. Turn the ignition key to the "On" position without starting the engine.
2. Press and hold the "Trip Reset" button on the instrument cluster.
3. While continuing to hold the "Trip Reset" button, turn the ignition key to the "Off" position.
4. Release the "Trip Reset" button and wait for a few seconds.
5. Turn the ignition key back to the "On" position and the trip computer should be reset.
Please note that this procedure may vary slightly depending on the specific model and year of your Mercedes-Benz vehicle, so it's always a good idea to consult the owner's manual for precise instructions.