A dead accumulator tank from the break booster is possible too.

In Antwort auf:

combo of pressure and turn



Thats it! Turn the caliper piston clockwise.
At Sparepartshops you can find the tool for that.

Gude Mario Audi 100 CD Autom. Bj.83 Audi 200 20v Bj.89 Audi 5000 Bj.85 Audi V8 3,6 Autom. Bj.88