My rear brakes don't work! I bled them, no air, brake fluid is flowing. It appears only one side of the calipers (outside) is working as the outter side of the rotors are clean. I think the inner pistons are siezed, the inner surface is rusted. I have heard of pistons siezing on, but never off. Anyone ever encountered this? could the calipers at fault or is it most likely the master cylinder just not sending enough pressure to move both pistons? Everything is quite rusted, I think the car sat for a long time.

'86 190D

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1982 300sd, new project car to restore

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