When this issue first presented itself I took my car to the local VW dealership (against my better judgement) and after having it all day they first gave me a half-hearted and unsure diagnosis, then told me the estimated cost, THEN told me my warranty was void. At any rate, I only saw red and was more concerned with getting my car back. Later I read the tech printout from VW and it may provide some insights though. I am far from a mechanic, with only rudimentary understanding of the many systems of an internal combustion engine, so some interpretation would be appreciated but they found "intake camshaft actual and specified to be spot on" but "camshaft phase position was barely out of spec". IN addition, they found no timing chain stretch and they could visually see 4 or 5 threads on the tensioner (not sure if that is good or bad). After all of this they recommended I have them replace the intake camshaft because..... why not?? So that is where I am at but I am on standby until the highly regarded, local VW/Audi can inspect it.
Also, I am sorry to the OP for high jacking this thread. Our issues seemed similar enough I thought we could pool our problems and subsequently, solutions.
Thanks for the replys!