rear brakes w211 cdi sport

[BIG_G_1979]

Hi guys it have noticed that rear passenger side disc looks like the pads have not been in contact with disc I have checked all other discs and look normal. What could cause this? How could I go about fixing it? Is the pistons on the rear caliper push or screw in? Thanks in advance

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[BIG_G_1979]

Any ideas guys want to take it apart but not sure if I need special tool to screw back piston in caliper to get back on or just push in? I don't want to start it if a special tool is needed thanks

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[merc85]

I belive they are push back pistons, the the caliper sliders are i think T45.

The caliper's do tend to stick ive had one replaced on the back of mine the other i managed to grease the slider's as it was binding.

Your issue could be down to sticky Caliper piston, Sliders or collapsed rear flexi hose id have thought.

 

[BIG_G_1979]

I will remove and free up sliders etc and see what happens from there thanks

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