My husband is from Germany where Audi's are made. He said that the radio alone is worth close to 1500 dollars. The code normally comes with the manual when you buy the car. You will have to take your car to an Audi dealer with proof that the radio is the original radio that went with that car as they go by the VIN number and the serial number. If you put the code in 3 times wrong the dealer can not help you. The radio has to be sent to the manufacturer to unlock it. This is high standard theft detection on expensive car radios
A German's wife, July 2008