I just got my 2002 a4 1.8t about a month ago and i started hearing noise under my steeringwheel. I checked all my relays and whenever i press on gas, my brake booster relay keeps on making clicking sound. I went to couple auto shops and they all have different stories. One body shop told me its the brake booster (there is liquid in the brake booster) and their charging me $300 for the part and $98/hr for 4hrs. Other body shop told me its probably the brake booster sensor or electronic problem. anyone had same problem?