I just recently replaced my hid ballast, and the dealer wanted $610 for it plus they had to special order it, for anybody that's having issues with their 2002 Audi A4 B6 headlamp hid/assembly, I've found the best price for replacement components was HenryLampa on ebay, I also had an opportunity to meet the guy since he's just a couple towns over. I was very skeptical at first but he is genuinely a very good ebay seller to deal with. I was very hesitant that I would get a questionable part from him, but he tested the component right in front of me, and said if I had any problems to just give him a call. So if your in search of some replacement headlamp components (I'm sure he has some available for anything, just e-mail him) he's a good guy to go with...

 

cool glad it works