Bringing this thread back from the dead ... My wife's 2002 A6 3.0 has developed a very small leak on the front, middle area of the engine. I pulled off the plastic undercarriage guard and wiped everything down to see a source of the problem. Nothing is jumping out at me, until I saw this link: http://www.audizine.com/forum/showth...s-Is-it-normal
I want to see if this is the problem, but I can't find where the therostat is based on the pics.
My wife is taking my car tomorrow, so I'll drive around and see if I can force the issue and get a bit of a leak to show up. I had it idle in my driveway for about 20 minutes and it was dry as a bone under there. No coolant in the oil either, no loss of power or smoke out of the exhaust (phew). Thanks for the help!