ML W163 brake caliper repair kit

Installation of brake caliper repair kit on the MERCEDES-BENZ M-Class (W163) vehicle is best done at a service station. To make the work easier, the unit should be removed from the vehicle and disassembled; and this requires special equipment and certain skills.

For pressing out pistons from the housing of the brake caliper, specialists use compressed air equipment that easily extracts the piston from its seat. You can also ask your assistant to press the brake pedal until stop to make the piston get out of the caliper, then disconnect the hydraulic hose and pull the component out.

Before installing new pistons, the housing of the caliper is to be cleaned to remove dirt and rust from the mounting seat. Gasoline may be used for this purpose. After rinsing, the caliper should be wiped with a piece of clean cloth and thoroughly dried. Never install new pistons into a wet caliper: gasoline destroys rubber seals.

To remove and install retaining rings, use a special remover that allows opening the component without damaging it.

Before installation, dust boot seats, sealing elements themselves, and pistons are to be treated with a special paste for hydraulic cylinders. It not only makes installation easier, but also protects the components of the caliper from destruction. Also apply another lubricant to guide pins and their dust boots. As a rule, the repair kit contains two bags of lubricants intended for servicing various components of the caliper.

Using a jack, unload the axle of the MERCEDES-BENZ M-Class (W163) vehicle at the side of replacement. Spin the wheel, ask your assistant to press the brake pedal, and then repeat spinning. If replacement has been done properly, the wheel should rotate freely.

Check and if necessary top up brake fluid in the reservoir on the master brake cylinder.

Bleed the brake system of the MERCEDES-BENZ M-Class (W163) vehicle, using the layout that can be found in the technical documentation to the vehicle. Never ignore this recommendation, as air in the brake system reduces efficiency of braking and may cause an accident.