A4 to S4 headlight conversion question
 

Just recently purchased my first Audi and I had a question regarding a headlight replacement. It's a 2011 A4 Quattro with a bad seal on the passenger headlight and since I'm going to replace it I was wondering if I could just swap out the basic A4 headlights for a set of S4's or would I have to run a HID conversion harness for the headlights to function properly? Thanks for the help.

DIY Halogen to Bixenon- Conversion Complete.

There is no difference between the A4 and S4 bixenon headlights.

Thanks gunsmoker. I read the link you provided and I'm assuming that this is what I would need to do in order to run the S4 headlights and just a $200 HID kit?