I just got done performing a 40,000 mile service to my V6 this weekend. I ordered ECS Tunings 40,000 mile service kit. It includes an airfilter, oil filter, pollin filter, 7 qts. ( atleast for the V6 ) of Pentosynth 5w-40 ( very good stuff and the factory fill I believe from what I hear), a new drain plug and crush washer, 6 ngk spark plugs ( again, for the V6, but they look exactly like the factory ones ), and a new fuel filter. All the fluid filters are made by Mann which I think is VW's factory supplier. The only thing I didn't get done was the fuel filter as I wasn't sure how to get the clamps off. Hopefully, if someone can tell me how, I'll get to that next weekend. As for the timing belt, typically 60,000 miles is the general rule of thumb for replacement. Ofcourse it never hurts to check the condition of it periodically until then.