To reset the 2013 Audi A6 oil change interval, please follow these instructions:

1. Start the engine.
2. Press the CAR button to access the service menu.
3. From the CAR menu select CAR SYSTEMS.
4. From the CAR SYSTEMS menu select SERVICE INTERVALS.
5. Select RESET OIL CHANGE INTERVAL and confirm.
6. Turn off the igntion.
7. Start the engine and verify the indicator has been reset.