Learn how to change rear brake pads (and rotors) on Mercedes-Benz vehicles. This guide applies to the majority of Mercedes-Benz models from 2006 to 2015 including such C, S, E, CLK, CL, ML, GL, R class. A complete list of applicable models can be found in the table below.
Park your Mercedes-Benz on a level surface. Jack up the car and remove the rear wheels.
Remove the metal clip using a flat head screwdriver. Push the bracket towards the front of the car to remove it.
Locate the two bolts that secure the caliper on the bracket.There are two small caps that need to be removed to see the bolts.Once you remove the bolts you will notice the caliper bolts.These are either T40 or T45 bolts. On some models, a 10mm Allen wrench is required.
Unplug the brake pad wear sensor.
Remove the caliper from the bracket.
Push the piston into the brake caliper using a brake pad spreader.If you don't have a brake spreader, use a flat head screwdriver to push the piston in as shown in the picture below. Removing the brake reservoir cap under the engine bay will make it easier to push the piston back into the caliper.
If you are changing the rotors, remove the two 18 mm bolts that secure the bracket to the rear wheel assembly.
Remove the T30 screw from the rotor.Release the rear parking brake. Once you remove the screw you can remove the rotor. If the rotor is rusted it may difficult to remove. If that is the case use, penetrating fluid and allow it to settle for at least 10 min. Use a rubber mallet to push the old rotor out. Make sure the vehicle is secure and will not roll.
Clean the rear hub and bracket from any debris or rust.Install the new Mercedes rear disk. Install rotor securing bolt.
Install the bracket and torque the 18mm bolts to specification.
Install the new Mercedes wear brake sensor on the new pads.You can reuse old wear sensor if the sensor wires are not exposed. If the brake pad wear sensor wires are exposed or you had a warning on your instrument cluster stating "Brake pad wear", you will need a new sensor.
Install new Mercedes rear brake pads.DO NOT APPLY GREASE OR ANTI-SQUEAL PASTE ON THE SURFACE BETWEEN THE PAD AND ROTOR.
Rember to apply anti-squeal grease to the back of the brake pads and at the area where the brake pads slide on the bracket.Apply grease to the guide pins.Slide the caliper on the bracket.
Tighten the guide pins to specification.Typical torque range is between 30 and 55 Nm and varies between models. Call your dealer to get the recommended torque specifications for your Mercedes-Benz.
Connect the brake pad wear sensor. Install the tire and torque the lug nuts.
If you disconnected SBC pump, reconnect it at this time. Start your car and press the brake pedal a few times until the pedal becomes hard to press.
Check the brake fluid and take your Mercedes-Benz for a test drive.
If your Mercedes-Benz has SBC brake system (common on early E-Class W211 and CLS models) it should be disabled before you work on the brake system.
Alternative method: You can disconnect the SBC brakes by unplugging the wire harness to the ABS pump. Brakes defective warning will show up on the instrument cluster, but it will turn off once the ABS pump is connected. By disconnecting your SBC pump using this method a fault code will be stored in the ABS or SBC control unit but will be reset once the ABS pump is reconnected.
Keeping SBC Active: If you decide to not disconnect the SBC pump, avoid opening any car door or lock/unlocking the car because the brakes will automatically apply. Be extremely careful when working on the brakes. If SBC pump is activated when the caliper is removed, it will press the piston and brake pads possibly causing injuries.
The typical cost to change Mercedes-Benz rear brake pads yourself averages $100. The average cost to change the brake pads at an auto mechanic or dealer range between $250 and $500. If you plan to replace the rotors the cost would be two to three times more than just changing the brake pads. Old rotors can be turned and reused if they have enough thickness.