Having problems with your 2004 Audi S4 ?
Audi S4 radio turns back on after you shut car off. In addition, the controls for the radio for the most part won't work, and you can't "Power off" the radio. It won't shut down, when you hit the power off function. Any clues on this "Christine" of a car.
Some cars have new system in the computer that lets the radio function for 20 minutes after the key is turned off and no doors have been opened, system should shut down immediately after you open a door
Repair Help & Product Troubleshooting for 2004 Audi S4
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