Stumbled across this over the weekend.....and must say it scared the crap out of me. Ordered the part today to fit later this week....Surprised that this hasn't been brought to my attention earlier along with the dv and pcv issues....Could be well worth checking out if your car has high mileage like mine.

VWVortex.com - Audi A4 2.0T Cam Follower Install Pictures

Cheers
A