Quote Originally Posted by 2008A4SLine View Post
Will these fit the stock halogen headlight assemblies? Do I have to change wiring, or can I use the existing connectors?
I wouldnt be able to answer that for you. I have factory Bi-Xenons on the A4. But I do have them in the fog lites. I used the same manufacturer for both my Ford Transit Connect and Mk1 Rabbit GTI and it was straight plug and play.