These models come in three types of front
Brake Caliper design. The Bosch FN3 and FS Ill designs, in which the brake pads are mounted in the caliper, the FN3 type having an anti-rattle spring and the FS Ill not, and the PC57/C60/PC60 types, in which the brake pads are mounted in the caliper mounting bracket. First of all, open the top of the brake fluid reservoir and empty approximately two-thirds of the brake fluid by pouring it out, making sure to rinse all the spilt brake fluid with clean water. Unscrew the front vehicle bolts, lift it high on jackstands, and clog the wheels at the other end. Wheels: Clean the caliper and the disc using the brake system cleaner, then take the wheels off, one brake assembly at a time. To remove the calipers and open up room in which the new pads will be installed, move the piston back into the bore, detach the electrical connector on the brake pad wear indicator, and unclip the pad retaining spring. In the FN3 and FS Ill calipers, the end caps have to be removed off the guide bushing to access the caliper guide pins, then unscrew the caliper guide pins or mounting bolts of the caliper to pull the caliper off the mounting bracket in a way that the caliper is not strained against the
Brake Hose. Take out the inner and outer pads (where applicable), check the
Brake Disc, and see that the guide pins slide freely and then rub them with high-temperature brake grease. In order to install new pads, it is necessary to insert the caliper piston back into the cylinder, cut the inner and outer pad and insert them into the corresponding positions, lubricate the guide pins and put them back. Last, screw the caliper back in, reconnect the brake pad wear indicator, press the brake pedal to make sure it is properly attached, get the wheels back on, drop the vehicle, and verify the level of brake fluid then test to make sure the brakes are operating correctly.