Important!

This replacement procedure can be used for:
MERCEDES-BENZ A-Class (W168) A 140 (168.031, 168.131), MERCEDES-BENZ A-Class (W168) A 160 (168.033, 168.133), MERCEDES-BENZ A-Class (W168) A 160 CDI (168.007), MERCEDES-BENZ A-Class (W168) A 170 CDI (168.008), MERCEDES-BENZ A-Class (W168) A 190 (168.032, 168.132), MERCEDES-BENZ A-Class (W168) A 160 CDI (168.006), MERCEDES-BENZ A-Class (W168) A 140 (168.031, 168.131), MERCEDES-BENZ A-Class (W168) A 210 (168.035, 168.135) … View more

The steps may slightly vary depending on the car design.

How to change rear wheel bearing on MERCEDES W168 [TUTORIAL AUTODOC]

All the parts you need to replace – Wheel Bearing for A-Class (W168) and other MERCEDES-BENZ models

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Replacement: wheel bearing – Mercedes W168. Tools you might need:

                      Wire brush
                    
                      WD-40 spray
                    
                      All-purpose cleaning spray
                    
                      Brake cleaner 
                    
                      Copper grease 
                    
                      Torque wrench
                    
                      Torx bit T30
                    
                      Drive socket # 12 
                    
                      Drive socket # 16 
                    
                      Drive socket # 30 
                    
                      Wheel impact socket #17
                    
                      Bush and bearing driver set
                    
                      Ratchet wrench
                    
                      Flat chisel
                    
                      Tap wrench
                    
                      Hammer
                    
                      Rubber mallet
                    
                      Impact screwdriver
                    
                      Circlip pliers
                    
                      Crow bar
                    
                      Wheel chock

Buy tools

Replacement: wheel bearing – Mercedes W168. Professionals recommend:

Do not re-use the bearing assembly of your Mercedes W168 car.
The wheel hub bearing replacement procedure is identical for both wheels on the same axle.
All work should be done with the engine stopped.

Replacement: wheel bearing – Mercedes W168. Use the following procedure:

Step 1

Secure the wheels with chocks.

Step 2

Loosen the wheel mounting bolts. Use wheel impact socket #17.
Step 3

Raise the rear of the car and secure on supports.
Step 4

Unscrew the wheel bolts.

AUTODOC recommends:
Warning! To avoid injury, hold the wheel while unscrewing the fastening bolts. Mercedes W168
Step 5

Remove the wheel.
Step 6

Clean the brake caliper fasteners. Use a wire brush. Use WD-40 spray.
Step 7

Unscrew the brake caliper fastening. Use a drive socket #12. Use a ratchet wrench.
Step 8

Spread the brake pads. Use a crowbar.
Step 9

Remove the brake caliper.

Replacement: wheel bearing – Mercedes W168. Tip from AUTODOC experts:
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 10

Remove the brake pads. Use a crowbar.
Step 11

Clean the brake caliper bracket fasteners. Use a wire brush. Use WD-40 spray.
Step 12

Unscrew the caliper bracket fastening. Use a drive socket #16. Use a ratchet wrench. Use a tap wrench.
Step 13

Remove the caliper bracket.
Step 14

Clean the brake disc fastener. Use a wire brush. Use WD-40 spray.
Step 15

Unscrew the brake disc fastening. Use Torx T30. Use an impact screwdriver.
Step 16

Remove the brake disc.
Step 17

Remove the wheel hub nut cap. Use a crowbar. Use a hammer.

Replacement: wheel bearing – Mercedes W168. Tip from AUTODOC:
In some cars, the wheel hub nut is not protected with a cap.
Step 18

Unstake the wheel hub retaining nut. Use a flat metal-working chisel. Use a hammer.
Step 19

Unscrew the hub nut. Use a drive socket #30. Use a tap wrench.
Step 20

Remove the hub and the bearing together, since they are a sealed unit.
Step 21

Clean the wheel hub bearing retaining ring. Use a wire brush. Use WD-40 spray.
Step 22

Remove the wheel hub bearing retaining ring. Use circlip pliers.
Step 23

Press out the wheel hub bearing. Use a bush and bearing driver set.
Step 24

Clean the hub bearing mounting seat. Use a wire brush. Use WD-40 spray.
Step 25

Press-fit a new bearing into the wheel hub. Use a bush and bearing driver set.

Replacement: wheel bearing – Mercedes W168. AUTODOC recommends:
Check to make sure the wheel hub bearing is positioned correctly. Avoid its misalignment. Stop pressing on the surface of the bearing immediately after it has been fitted into its mounting seat.
Step 26

Install the wheel hub bearing retaining ring. Use circlip pliers.
Step 27

Clean the hub bearing mounting seat. Use a wire brush. Use all-purpose cleaning spray.
Step 28

Install the new wheel hub with a bearing.
Step 29

Tighten the wheel hub nut. Use a drive socket #30. Use a torque wrench. Tighten it to 170 nm torque.
Step 30

Restake the wheel hub retaining nut. Use a flat metal-working chisel. Use a hammer.
Step 31

Install the cap of the hub nut. Use a rubber mallet.
Step 32

Clean the hub. Use a wire brush. Treat the contacting surface. Use copper grease.
Step 33

Install the brake disc.
Step 34

Tighten the brake disc fastening. Use Torx T30. Use a torque wrench. Tighten it to 9 Nm torque.
Step 35

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

AUTODOC recommends:
Replacement: wheel bearing – Mercedes W168. After applying the spray, wait a few minutes.
Step 36

Install the brake caliper bracket.
Step 37

Tighten the brake caliper bracket. Use a drive socket #16. Use a torque wrench. Tighten it to 55 nm torque.
Step 38

Install the brake pads.
Step 39

Install the brake caliper and fix it. Use a drive socket #12. Use a torque wrench. Tighten it to 30 nm torque.
Step 40

Treat the surface where the brake disc contacts the wheel rim. Use copper grease.
Step 41

Clean the brake disk surface. Use a brake cleaner.

Replacement: wheel bearing – Mercedes W168. Professionals recommend:
After applying the spray, wait a few minutes.
Step 42

Install the wheel.

AUTODOC recommends:
Warning! To avoid injury, hold the wheel while screwing in the fastening bolts on the car. Mercedes W168
Step 43

Screw in the wheel bolts. Use wheel impact socket #17.
Step 44

Lower the car and working in a cross order, tighten the wheel bolts. Use wheel impact socket #17. Use a torque wrench. Tighten it to 110 Nm torque.
Step 45

Remove the jacks and chocks.

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