I have put non-Audi phones in Audi's but is quite a pain. 1. How good are you with an Ohm meter? I just in stalled a Motorola in a Cougar which had been factory prewired, I had to change the connections inside the Rj-11 jack and a few other places. 2. Which phone are you planning on putting in? 3. Which Audi do you have? Michael