Audi car radios are preinstalled with an antitheft deterrent. If the radio is disconnected from the wire harness, the battery is disconnected from the vehicle or the battery runs flat, owners must enter a code to unlock the radio.
Your original vehicle paperwork contains the radio code on a credit-card sized document. Look through your vehicle paperwork to find the four-digit code and enter it in the switched-on radio to unlock it.
If you cannot find your code document, contact your nearest Audi dealer. Provide your vehicle identification number and identification details to prove you are the owner. The dealer will find your code in its database and give it to you to enter in the vehicle.
If you want to purchase the unlock code for your Audi's radio, Internet sites provide this service. Visit one of these sites, provide your radio type, serial number and pay the fee. The code will then be e-mailed to you, and you can it enter it in your Audi radio.
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