1. Make sure the ignition is off.
2. Press and hold the "OK" button on the steering wheel.
3. While holding the "OK" button, turn the ignition on.
4. Continue to hold the "OK" button until you see the service reset menu on the display.
5. Use the arrow keys to navigate the menu and select "Reset Service."
6. Press the "OK" button to confirm the reset.
7. The service indicator will be reset, and the display will show the next service date and mileage.
Note: If you are unable to reset the service indicator, you may need to take your vehicle to a Mercedes-Benz dealership or authorized service center.