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.
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.
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