To reset the 2004 Audi A3 service light, please follow these instructions:
1. Turn off the ignition.
2. Press and hold the button to the right of the LCD display in the instrument cluster.
3.Turn the ignition on (do not start the engine); the message “SERVICE” appears. Release button.
4. Within 5 seconds, pull the same button and “SERIVCE IN … KM … DAYS” appears.
5. Turn off the ignition.
6. Start the engine and verify indicator has been reset.