How do you reset service indicator message for a Mercedes C 300 W 4 model 2012?

To reset the service indicator message on a 2012 Mercedes C300 W4, turn the ignition to the "On" position without starting the engine. Press the gas pedal three times within 10 seconds. Then, turn the ignition off and back on to ensure the service indicator is reset. If done correctly, the service message should no longer appear.