Reset service light changing oil Audi a3?

Answer:

try this

 Here it is as clear as I can make it:
 0. Display reads "Service!" when you first start the car.
 1. With the ignition key in the off position, push and hold the right button under the speedometer. This is the button you use to reset the trip odometer also.
 2. Turn the ignition key to the on position, but don't start the engine. Keep holding down the right button while you turn the key.
 3. Push the left button under the tachometer. Your service light should reset to say something like "Service in 8100 miles."