Recommended replacement interval for the part category Brake disc : 50000 km

Important!

This replacement procedure can be used for:
MERCEDES-BENZ B-Class (W245) B 170 NGT (245.233), MERCEDES-BENZ B-Class (W245) B 180 NGT (245.233), MERCEDES-BENZ B-Class (W245) B 180 CDI (245.207), MERCEDES-BENZ B-Class (W245) B 200 CDI (245.208), MERCEDES-BENZ B-Class (W245) B 170 (245.232), MERCEDES-BENZ B-Class (W245) B 200 TURBO (245.234), MERCEDES-BENZ B-Class (W245) B 150 (245.231), MERCEDES-BENZ B-Class (W245) B 160 (245.231), MERCEDES-BENZ B-Class (W245) B 180 (245.232), MERCEDES-BENZ B-Class (W245) B 200 CDI (245.208) … View more

The steps may slightly vary depending on the car design.

How to change rear brake discs / rear brake rotors on MERCEDES-BENZ B200 (W245) [TUTORIAL AUTODOC]

All the parts you need to replace – Brake Discs for B-Class (W245) and other MERCEDES-BENZ models

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Replacement: brake discs – Mercedes W245. List of the tools you'll need:

                      Wire brush
                    
                      WD-40 spray
                    
                      Brake cleaner 
                    
                      Copper grease 
                    
                      Combination spanner #13
                    
                      Combination spanner #15
                    
                      Torx bit T30
                    
                      Drive socket # 13 
                    
                      Drive socket # 16 
                    
                      Wheel impact socket #H12
                    
                      Ratchet wrench
                    
                      Torque wrench
                    
                      Tap wrench
                    
                      Brake caliper wind back tool
                    
                      Impact screwdriver
                    
                      Crow bar
                    
                      Wheel chock

Buy tools

Replacement: brake discs – Mercedes W245. AUTODOC recommends:

Replace the brake disks on the car Mercedes W245 in complete set for each axis. Regardless of the state of components. This will ensure even braking.
The replacement procedure is identical for both brake disks on the same axle.
When changing the brake discs, always replace the brake pads.
Warning! Shut down the engine before starting any work – Mercedes W245.

Carry out replacement in the following order:

Step 1

Open the bonnet. Unscrew the brake fluid reservoir cap.
Step 2

Secure the wheels with chocks.
Step 3

Loosen the wheel mounting bolts. Use wheel impact socket #H12.
Step 4

Raise the rear of the car and secure on supports.
Step 5

Unscrew the wheel bolts.

AUTODOC recommends:
Important! Hold the wheel while unscrewing the fastening bolts. Mercedes W245
Step 6

Remove the wheel.
Step 7

Clean the brake caliper fasteners. Use a wire brush. Use WD-40 spray.
Step 8

Unscrew the brake caliper fastening. Use a combination spanner #13. Use a combination spanner #15.
Step 9

Spread the brake pads. Use a crowbar.
Step 10

Remove the brake caliper.

Replacement: brake discs – Mercedes W245. Professionals recommend:
Tie the caliper to the suspension or to the body with a wire without disconnecting from the brake hose to prevent depressurization of the brake system.Make sure that the brake caliper is not hanging on the brake hose.Don't press the brake pedal after the brake caliper has been removed. As a result, the piston can fall out from the brake cylinder, and brake fluid leakage and depressurization of the system may occur. Check the brake caliper bracket, brake caliper guide pins and boots. Clean them. Replace, if necessary.
Step 11

Remove the brake pads.
Step 12

Clean the brake caliper bracket fasteners. Use a wire brush. Use WD-40 spray.
Step 13

Unscrew the caliper bracket fastening. Use a drive socket #16. Use a tap wrench. Use a ratchet wrench.
Step 14

Remove the caliper bracket.
Step 15

Clean the brake disc fasteners. Use a wire brush. Use WD-40 spray.
Step 16

Unscrew the brake disc fastening. Use Torx T30. Use an impact screwdriver.
Step 17

Remove the brake disc.
Step 18

Clean the hub. Use a wire brush. Treat the contacting surface. Use copper grease.
Step 19

Install the brake disc.
Step 20

Tighten the brake disc fastening. Use Torx T30. Use a torque wrench. Tighten it to 9 Nm torque.
Step 21

Clean the brake caliper bracket from dirt and dust. Use a wire brush. Use a brake cleaner.

Replacement: brake discs – Mercedes W245. Tip from AUTODOC:
After applying the spray, wait a few minutes.
Step 22

Install the brake caliper bracket.
Step 23

Tighten the brake caliper bracket. Use a drive socket #16. Use a torque wrench. Tighten it to 55 Nm torque.
Step 24

Install the brake pads.
Step 25

Treat the brake caliper piston. Use a brake cleaner.

AUTODOC recommends:
Replacement: brake discs – Mercedes W245. After applying the spray, wait a few minutes.
Step 26

Press in the brake caliper piston. Use brake caliper wind back tool.
Step 27

Install the brake caliper and fix it. Use a combination spanner #13. Use a combination spanner #15. Use a drive socket #13. Use a torque wrench. Tighten it to 35 Nm torque.
Step 28

Treat the surface where the brake disc contacts the wheel rim. Use copper grease.
Step 29

Clean the brake disk surface. Use a brake cleaner.

Replacement: brake discs – Mercedes W245. AUTODOC experts recommend:
After applying the spray, wait a few minutes.
Step 30

Install the wheel.

AUTODOC recommends:
Warning! To avoid injury, hold the wheel while screwing in the fastening bolts on the car. Mercedes W245
Step 31

Screw in the wheel bolts. Use wheel impact socket #H12.
Step 32

Lower the car and working in a cross order, tighten the wheel bolts. Use wheel impact socket #H12. Use a torque wrench. Tighten it to 130 Nm torque.
Step 33

Remove the jacks and chocks.

Replacement: brake discs – Mercedes W245. Tip:
Check the brake fluid level in the expansion tank and refill if necessary.
Step 34

Tighten the brake fluid reservoir cap.

AUTODOC recommends:
Mercedes W245 – Without starting the engine, press the brake pedal several times until it feels firm.
Step 35

Close the hood.

Comments – 5

@user_1794021

08.08.2023 19:00

Member

Is there any need to back off the rear brake linings by inserting a screwdriver through a hole in the disc/drum to move the adjusting star wheel? Does the disc come off easily without having to do this?
- Jessica_L
  
  11.08.2023 15:02
  
  Member
  
  It is impossible to give an unambiguous answer whether or not to reduce the pads using an adjusting sprocket, since this may depends on the condition of the pads, discs. If the discs are worn, then yes, you need to reduce the gaskets through the hole with a screwdriver. If the disc is in good condition, then it will not be difficult to remove it.
- Jessica_L
  
  11.08.2023 15:03
  
  Member
  
  You can find out more information for the replacement of brake discs by watching the video on our youtube channel using the link https://www.youtube.com/watch?v=z_x4cjCCoh0&t=1s&ab_channel=autodoc.co.uk
@user_1794021

16.09.2023 22:45

Member

The caliper piston wind back tool shown looks like it has pins. These tools are usually used for cars with electric parking brakes.
I thought the W169/W245 had a conventional piston that just pushed back with no need to rotate it.
Please clarify.
- Jessica_L
  
  18.09.2023 07:23
  
  Member
  
  This car has a regular piston. The tool is universal, it has pins, but the pins are fitted with a flat attachment that simply presses the piston inward, without twisting.

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