Locate the serial number of your radio. It is usually printed on a label on the radio itself, or you can find it in the owner's manual.
Contact an Audi dealer or service center and provide them with the serial number of your radio.
Provide them with additional information they may require, such as the year, make, and model of your vehicle.
They will verify the information and provide you with the radio security code.
Once you have obtained the radio security code, you can use it to deactivate the anti-theft mode of your radio and restore functionality. Remember to write down the radio security code in a safe place for future reference.
