Hello together, if I want to change the rear coverings, I have to put the piston back with the special tool from AUDI or EBAY, in order to be able to insert the new covering. Just tell me just how far I have to/can turn it back without unintentionally bringing the compensation container to overflow. Where is the container at the TT? Have done this with a buddy already recently, but did not pay attention to such things, because I thought he had the piston against a It’s urgent because I want to do this tomorrow. Thank you.