Rear Brake Pad
2002 C240:  Rear Brake Pad Swap
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Perform all these installs at your own risk.  Know how to use all of your shop equipment, and take necessary safety precautions when performing ANY modifications and or maintenance items to your vehicle.  Seek the advice of a paid professional and do not substitute this publication for the advice of a paid professional.  This product is how we accomplished our installs and is not meant to be carved in stone. is not responsible for a mistake, misprint, or any other error found in this guide.  This guide is intended as a supplement and not to be your only source of information.

Symptom(s):  The rear brake pads are wore to nothing and they need to be changed.
Date Repaired:  1.012006    Mileage:  133,500

Quote to fix from local MB dealer:

Part information, cost, were purchased: 

1. MB OEM Brake Pads - Part number: A 003 420 27 20

Time it took to install:
  60 minutes

Complexity of Install: 

Tools ne
eded for this install: 
1. Ratchet
2. Short socket extension (use to remove wheel bolts)
3. 17 mm socket
4. Small punch (I used a #3 hex wrench)
5. Lift - Jack stands and jack
6. Safety glasses
7. Well ventilated area
8. Protective latex like gloves
9. Hammer
10. C-Clamp
11. Rope or bun-gee cord (support caliper while off rotor)

This is an easy service to perform and will cost you much less than MB performing the installation. Just be careful and take your time. After all, this is your brakes and not a rear spoiler so be sure you are careful.

Installation Procedure
1. Raise your hood, and locate the black triangular cover nearest the driver side side mirror (Figure 1).
2.  Remove the cover by turning the two locks 90 degrees exposing the brake fluid resovoir. Loosen the brake fluid reservoir cap but do not remove (Figure 2).
3.  Jack the car up and support the car on a jack stand or other safe device. Remove the rear tire using a 17 mm socket.

4. For sanity sake, all the pictures to the right are of the driver side rear brake caliper (Figure 3). Locate the brake caliper and find the two 17 mm bolts on the back side of the caliper (Figure 4). Remove the two 17 mm bolts and when you pull the

5. You will need be ready to catch the brake caliper before it falls after you remove the second bolt. Be sure not to let it fall so you don't damage your brake line. Use a rope or small bun-gee cord to act as a security blanket in case your arms get tired.

6. You need to remove the pin (Figure 4) by using a hammer and punch. We used a small hex wrench since it needs to be long and skinny. It will be difficult and awkward. Pressing down on top of the spring will help get the pin out with ease once you get the pin partially out. Have patience.

7. Once the pin is removed you will need to use the C-Clamp and one of the old brake pads to push the caliper pistons back into the frame (Figure 5). Take your time on this step and slowly compress each piston (one on each side).

8. Take the new pads out of the box (Figure 6) and insert them into the caliper and place them back on the caliper frame (Figure 7). You can put the two 17 mm caliper frame bolts back in hand tight at this point to help hold the frame. I did not install the bolts at this point since I had my caliper frame tied tight.

9. You will need to insert the spring back onto the caliper frame and then insert the pin (Figure 7). It is much easier this time but will require you to easily hammer the pin back in. Press on the spring and the pin should easily slide through the inside brake pad, over the spring, the outside brake pad, and finally through the other side of the caliper frame.

10. Place loc-tite on the two 17 mm caliper frame bolts and tighten to 115 Newton-meters (Figure 8).

11. Double check that the pin is installed properly and the bolts are tight.

12. Reinstall the wheel and tighten the 17 mm wheel bolts to 100 ft-lb using the star pattern to tighten each wheel bolt (Figure 9).

13. Lower the car and your done!

Click on the photographs to enlarge them.
Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9