I recently changed the parking brake wires and shoes on my car, as everything was rusted solid. (damn that road salt)

Everything moves just fine now and is correctly assembled & adjusted, but the parking brake is very weak. It can hold the car in a small incline or in gear while idling, but that's it. I think it might be too weak to pass the annual inspection, where it should be able to hold the car in a 9 degree incline. What can cause such a weak function? I know it's not the most powerful parking brake, but I think it should be a little bit better..

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'95 E36T AMG (124.092)
'98 E200T (210.235)
'00 E430 4Matic (210.283)

Did you clean the inside of the new brake disc where the parking brake shoes ride?

Did you adjust the shoes so they touched the disc & then back-off 3 clicks?

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