Chain tensioner confirmed. I’ve already ordered the parts at my own expense. Worked out to $500 for overnight shipping and all parts/seals. What pisses me off is that it’ll take ECS 3-4 days just to get the tensioner on hand. Hopefully the dealership can work with the time needed for shipping. Anyways, this still beats paying the full Audi/VW price ($1200) for just the tensioner alone.
I hope this works out.
Oh and of course the cost for labor and etc. fees are definitely going to be in the standard “German car” price range.