Important!

This replacement procedure can be used for:
MERCEDES-BENZ A-Class (W169) A 150 (169.031, 169.331), MERCEDES-BENZ B-Class (W245) B 150 (245.231)

The steps may slightly vary depending on the car design.

How to change front wheel bearing MERCEDES-BENZ A W169 TUTORIAL | AUTODOC

Replacement: wheel bearing – Mercedes W169. Tools you need:

                        Wire brush
                      
                        WD-40 spray
                      
                        Brake cleaner 
                      
                        Copper grease 
                      
                        Combination spanner #21
                      
                        Drive socket # 10 
                      
                        Drive socket # 18 
                      
                        Drive socket # 21 
                      
                        Drive socket # 22 
                      
                        Drive socket # 30 
                      
                        Torx bit T30
                      
                        Wheel impact socket #17
                      
                        Ratchet wrench
                      
                        Torque wrench
                      
                        Ball joint puller
                      
                        Bush and bearing driver set
                      
                        Flat chisel
                      
                        Flat Screwdriver
                      
                        Hammer
                      
                        Circlip pliers
                      
                        Crow bar
                      
                        Wheel chock

All the parts you need to replace – Wheel Bearing for A-Class (W169) and other MERCEDES-BENZ models

MERCEDES-BENZ A-Class (W169) A 150 (169.031, 169.331)

MERCEDES-BENZ B-Class (W245) B 150 (245.231)

MERCEDES-BENZ A-Class (W169) A 150 (169.031, 169.331)

MERCEDES-BENZ B-Class (W245) B 150 (245.231)

MERCEDES-BENZ A-Class (W169) A 150 (169.031, 169.331)

MERCEDES-BENZ B-Class (W245) B 150 (245.231)

Replacement: wheel bearing – Mercedes W169. Tip from AUTODOC:

Do not re-use the bearing assembly of your Mercedes W169 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 W169. Recommended sequence of steps:

Step 1

Secure the wheels with chocks.
Step 2

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

Raise the front of the car and secure on supports.

Step 4

Unscrew the wheel bolts.

Replacement: wheel bearing – Mercedes W169. AUTODOC recommends:

To avoid injury, hold up the wheel when unscrewing the bolts.
Step 5

Remove the wheel.
Step 6

Remove the hub bearing protection cap.Use a flat metal-working chisel.Use a hammer.

Please note!

Some cars are not equipped with wheel hub caps.
Step 7

Clean the wheel hub fastener.Use a wire brush.Use WD-40 spray.

Step 8

Unscrew the wheel hub axle nut. Use a drive socket #30.
Step 9

Clean the brake caliper bracket fasteners. Use a wire brush.Use WD-40 spray.
Step 10

Unscrew the caliper bracket fastening.Use a drive socket #18.Use a ratchet wrench.
Step 11

Remove the brake caliper together with its bracket.

Replacement: wheel bearing – Mercedes W169. 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 12

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

Step 13

Unscrew the brake disc fastening.Use Torx T30.Use a ratchet wrench.
Step 14

Remove the brake disc.
Step 15

Clean the fastener connecting the tie rod end to the steering knuckle. Use a wire brush.Use WD-40 spray.

Step 16

Unscrew the end fastening nut to the steering knuckle.Use a drive socket #22.Use a ratchet wrench.
Step 17

Disconnect the tie rod end from the steering knuckle.Use a ball joint puller.
Step 18

Clean the ABS sensor fastener.Use a wire brush.Use WD-40 spray.

Step 19

Unscrew the ABS sensor fastener.Use a drive socket #10.Use a ratchet wrench.
Step 20

Disconnect the ABS sensor.

Step 21

Clean the fastener that connects the ball joint to the steering knuckle.Use a wire brush.Use WD-40 spray.

Step 22

Unscrew the ball joint fastening to the steering knuckle.Use a combination spanner #21.
Step 23

Disconnect the lower arm from the steering knuckle.Use a crowbar. Use a hammer.
Step 24

Clean the fastener of the bracket that connects the brake hose to the shock strut. Use a wire brush.Use WD-40 spray.

Step 25

Remove the bracket from the shock absorber strut. Use a flat screwdriver.
Step 26

Clean the fasteners connecting the shock strut to the steering knuckle.Use a wire brush.Use WD-40 spray.

Step 27

Unscrew the lower fastener connecting the shock strut to the steering knuckle.Use a combination spanner #21.Use a drive socket #21.Use a ratchet wrench.
Step 28

Remove the fastening bolts.

Step 29

Remove the steering knuckle together with the hub.
Step 30

Press the wheel hub out from the tapered roller bearing.Use a bush and bearing driver set.Use a hammer.
Step 31

Remove the retaining ring from the steering knuckle.Use circlip pliers.
Step 32

Press out the wheel hub bearing.Use a bush and bearing driver set.
Step 33

Clean the hub bearing mounting seat.Use a wire brush.
Step 34

Press the new bearing in the steering knuckle.Use a bush and bearing driver set.Use a hammer.

Replacement: wheel bearing – Mercedes W169. AUTODOC experts recommend:

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 35

Install the retaining ring in the steering knuckle.Use circlip pliers.
Step 36

Press the wheel hub into the bearing inner race.Use a bush and bearing driver set.
Step 37

Install the steering knuckle with a hub in assembly.
Step 38

Install the fastening bolts.

Step 39

Screw in the fastener that connects the shock strut to the steering knuckle.

Step 40

Tighten the lower fasteners connecting the shock strut to the steering knuckle.Use a combination spanner #21.Use a drive socket #21.Use a torque wrench.Tighten it to 95 Nm torque.
Step 41

Install the bracket onto the shock absorber strut.
Step 42

Connect the lower arm to the steering knuckle.Use a crowbar.

Step 43

Tighten the ball joint fastener. Use a combination spanner #21.Use a torque wrench.Tighten it to 60 nm torque.
Step 44

Connect the ABS sensor.

Step 45

Screw in the ABS sensor fastener.Use a drive socket #10.Use a ratchet wrench.
Step 46

Connect the tie rod end to the steering knuckle.

Step 47

Tighten the fastening nut connecting the tie rod end to the steering knuckle. Use a drive socket #22.Use a torque wrench.Tighten it to 70 nm torque.
Step 48

Tighten the hub.Use a drive socket #30.Use a torque wrench.Tighten it to 170 nm torque.
Step 49

Install the hub bearing protection cap.Use a hammer.
Step 50

Clean the hub.Use a wire brush.

Step 51

Treat the contacting surface.Use copper grease.
Step 52

Install the brake disc.
Step 53

Tighten the brake disc fastening.Use Torx T30.Use a torque wrench.Tighten it to 9 Nm torque.
Step 54

Clean the mounting seats of the caliper and its bracket.Use a wire brush.Use WD-40 spray.

Step 55

Install the brake caliper together with its bracket.
Step 56

Tighten the brake caliper bracket.Use a drive socket #18.Use a torque wrench.Tighten it to 70 Nm torque.
Step 57

Treat the surface where the brake disc contacts the wheel rim. Use copper grease.
Step 58

Clean the brake disk surface.Use a brake cleaner.

AUTODOC recommends:

Replacement: wheel bearing – Mercedes W169. After applying the spray, wait a few minutes.
Step 59

Install the wheel.

Replacement: wheel bearing – Mercedes W169. Tip:

To avoid injury, hold up the wheel when screwing in the fastening bolts.
Step 60

Screw in the wheel bolts.Use wheel impact socket #17.
Step 61

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 120 nm torque.
Step 62

Remove the jacks and chocks.

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