I just had my 37,500 miles service done on my 1997 1.8T. Before I went to the dealer, I found my coolant was discolored and seems to have some contamanent in the system. The dealer told me they found oil in the coolant and they replaced the oil to water cooler on the filter flange (The exact word they use on my statement). The parts they replaced are 1) 068-117-021-BX oilcool 2) 8DO-121-403-D Reservo 3)G-012-A8D-A1 AntiFre 4) 034-115-561-A Oil Filter. Just my 2 cents.<p>By the way, the service (Barrier Audi, Bellevue, WA.) is excellent. <br>