Hello everybody , I have a 2014 audi a4 b8 2.0 tdi (rhd) and I am having some issues with the rear right brake caliper getting stuck
At first I thought it was the caliper itself and replaced it but still having the issue , once I engage the EPB it gets compeltely stuck
I also cleaned and lubricated the guide pins with no fix
Anyone had the same issue please? I would greatly appreciate your insights about this

 

To release pressure you should have opened the bleeder valve. Usually you should do that anyway to not push nasty old brake fluid back into the master cylinder. You also shouldn't really NEED to open the bleeder valve, as pressure shouldn't be retained in the brakes. It is not a twist type, since the parking brake is tiny drum brake style under the rotor hat. Its probably time for a new caliper. I'm gonna guess you were not applying uniform pressure on the face of the piston, it became wedged, and you just pressed harder and harder. Then you popped the piston out and are having difficulty getting the o-ring back into the cylinder.