Parking brake

From W220 S-Class Encyclopedia
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Adjusting Parking Brake

Take off the rear wheel, observe how freely the rotor turns while turning it by hand.

Align one of the lug bolt holes with the adjusting wheel inside. One enthusiast found his was aligning with one of the holes at 2 o'clock position. The adjusting wheel could be at different positions on different model and years. You just have to look for it.

Hold a flashlight into the hole to see what the tooth of the wheel inside looks like and insert a flat blade screwdriver through the hole and catch between 2 teeth.

W220_Adjusting_Parking_Brake.JPG

Start moving the screwdriver handle upward (tip of the screwdriver moving downward) to turn the adjusting wheel clockwise, do about 2 turns and turn the rotor to see if there is a slight resistance turning the rotors and adjust more or less depending on the resistance.

Finally relieve the load on the automatic slack adjuster. Lift center hold down clip using a screwdriver so that the cable slack adjuster sets itself automatically.

W220_Adjusting_Parking_Brake_Center_Hold_Down_Clip.JPG