Yep, damn it. I just ordered the needed oem parts, new adjuster, adjuster gasket and gasket for the cylinder head cover, total 640€

Fortunately it's the bank1 side, it's a little bit easier to do so I won't have to pay myself sick. No, I wont do it myself. No place, no nerves and I dont want to play when it has something to do with the camshaft timing. I dont have tools to lock the camshaft.

Edit: Problem solved. Reason was a totally loose adjuster connector behind the engine. A mechanic figured this out when checking how difficult it is to change the adjuster.

 

Best news in the world (at the moment) I had just a loose connector to camshaft adjuster unit. I didn't see it because it was behind the engine. Hopefully I can cancel the parts order...