How do you reset your c service message on a 2007 Mercedes Benz S 550?

To reset the "C Service" message on a 2007 Mercedes Benz S 550, first turn the ignition to the "ON" position without starting the engine. Press the gas pedal three times within five seconds. After this, turn the ignition off, then back on to check if the service message has cleared. If necessary, repeat the process.