Mercedes W205 Rear Brake Pad & Rotor Replacement Instructions

Do your Mercedes-Benz brakes feel soft and weak due to brake pad and rotor wear? Learn how to fix the problem by replacing the rear brake pad and rotor of your Mercedes-Benz.

When servicing your brakes, one thing to consider is whether you should change just your brake pads or both the brake pads and rotors. Mercedes recommends changing them both at the same time.

Replacing rear brake pads on Mercedes W205 is a fairly easy job. The only specific step is releasing the electric parking brakes, as it uses the same caliper as the main brake. However, this can be done without any special tools.

What you will need

• W205 Rear Brake Pads & Rotors
  • With wear sensor
  • PN: A1695401617, A0004208200, 0004208200
• Mechanic tool set metric
• Low profile jack
• Jack stands
• Wheel chocks
• Torque wrench
• Breaker bar
• Flathead screwdriver
• Brake caliper spreader

Procedure

1. While the vehicle is still on the ground and with the parking brake on, use a breaker bar and a 17mm socket to break free all rear-wheel lug nut bolts. 
2. Open the hood and locate the brake reservoir. During this procedure, extract a small amount of brake fluid from the reservoir to prevent it from overflowing. When you are done, fit the brake fluid reservoir cap.
3. Block front wheels to prevent the car from any movement
4. Inside the car, turn on the ignition and press and hold both OK and Telephone buttons on the steering wheel until the vehicle data menu appears. 
5. Use the arrow button to navigate to brake pad replacement, and press OK to move the rear brake caliper to the fitting position. You will hear the movement from the back as the brake calipers retract. Also, the ABS light will illuminate, and the red brake warning light will flash to confirm that the fitting position is active.
6. Locate rear lighting points, lift the rear of your car in the air using a jack, and secure it with jack stands. 
7. Remove all wheel lugs and remove the wheel itself. 
8. Using a suitable screwdriver, remove the anti-rattle bracket. 
9. Using a thin screwdriver. Disconnect the brake pad wear sensor from its harness.
10. At the backside of the caliper, remove the black plastic caps to gain access to guide bolts. 
11. Remove the guide pins using a 7mm hex key socket. 
12. Pull the caliper off the brake rotor. This may take some wiggling.
13. Brake pads will remain seated within the bracket, so you must slide them out.
14. Using a brake pad spreader tool, spread out brake pistons to make enough room for new, thicker brake pads.
15. Before installing new pads into the caliper, fit the new brake sensor to the outer one.
16. Install new brake pads into the bracket and pull the sensor wire through the slot in the caliper.
17. Refit the brake caliper onto the bracket and tighten the bolts to 25 ft-lbs​ using a torque wrench.
18. Connect the brake pad wear sensor to its harness
19. Refit all remaining parts in reverse order
20. Repeat the procedure on the other rear wheel
21. Lower the car on the ground and torque all-wheel bolts to 96 ft-lbs​ using a torque wrench.
22. Push the brake pedal several times until it gets hard, then top off the brake fluid reservoir.
23. Back inside the car, exit the fitting position by pressing OK on the steering wheel. You will hear the movement from the back as the brake caliper squeezes and calibrates its position. After this is done, press OK to confirm.
24. Start the engine and press the brake pedal several times until the pedal feels hard again.

Torque Specifications

• Wheel bolts: 96 ft-lbs​
• Rear caliper guide bolt: 25 ft-lbs​

We hope you find the Mercedes W205 Rear Brake Pad & Rotor Replacement Instructions guide helpful. Check these troubleshooting and repair guides for more help on your Mercedes-Benz.

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