1. Turn the ignition key to the "On" position without starting the engine.
2. Press and hold the "OK" button on the instrument cluster.
3. While holding the "OK" button, turn the ignition key to the "Start" position.
4. Continue to hold the "OK" button for approximately 10 seconds until the service indicator message disappears.
5. Release the "OK" button.
The service indicator message should now be reset, indicating that the A or B service has been completed.
Note: If the service indicator message does not reset, it is possible that there is a problem with the vehicle's electronic systems, and you may need to have it diagnosed by a professional mechanic.