How to Reset the Service Indicator Message on a Mercedes Benz ML320

1. Turn the ignition switch using your key to the 'II' position.
2. Press the trip odometer reset button twice within one second. This must be done within four seconds of moving the ignition to the 'II' position. This causes the car to enter reset mode.
3. Turn the ignition switch to the '0' position.
4. Press and hold the trip odometer reset button.
5. Turn the ignition switch to the 'II' position.
6. Release the trip odometer reset button when the service indicator resets and a chime sounds. Turn the ignition switch off.