How do you reset the service G plus lighy on 2003 e320?

To reset the service "G" light on a 2003 Mercedes-Benz E320, you need to turn the ignition key to the "on" position without starting the engine. Then, press the gas pedal three times within five seconds. Afterward, the service light should turn off. If it doesn't reset, you may need to check for any lingering issues or consult the owner's manual for further instructions.