Replacing rear brake pads (Mercedes-Benz S-Class W116)

Brake pads must be replaced if the thickness of the friction layer of the lining is less than 2.0 mm.

Raise the car and remove the wheels.

Using a punch, remove the upper brake shoe mounting pin, remove the spring cross-shaped bracket and remove the lower pin. Fig. 253 shows the rear wheel brake caliper.



Remove the brake pads.

When reusing brake pads, they must be marked and then removed before removal. When replacing brake pads, simply remove the old pads. If the brake pad does not come out of the cavity in the caliper, attach a wire loop to the hole and pull the pad out with a jerk.

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Thoroughly clean the cavities in the brake pad support and check the condition of the dust rings and cylinders.

If the brake pads are heavily worn, it is necessary to move the pistons apart in the brake cylinders. Pay attention to the brake fluid level in the reservoir and, if necessary, suck out some of the fluid.



When installing brake pads, perform the following work:

Apply a layer of Molycote "u" paste to the surfaces of the brake pad base, shown by the arrows in Fig. 245, and insert the new pads into the caliper.

Install the spring cross-shaped bracket and insert the brake shoe mounting pin into the caliper. Press the free end of the bracket and insert the second pin.

Check the movement of the brake pads in the caliper cavity.

Press the brake pedal several times to ensure that the brake pads are in the correct position.

Place and secure the front wheels, lower the car onto its wheels.

Removal and installation the brake caliper

Removing and installing the caliper is easy. After disconnecting the brake hose, unscrew the two caliper mounting bolts and remove the caliper. When installing, use a new third-party bar, tighten the mounting bolts and tighten to 50 Nm. If the brake hose was disconnected, tighten it to 15 Nm. After installation, bleed the brake hydraulic system.