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.
AUTODOC recommends:
Warning! To avoid injury, hold the wheel while unscrewing the fastening bolts. Mercedes W169
Step 5
Remove the wheel.
Step 6
Disconnect the ABS sensor wiring. Use a crowbar.
Step 7
Disconnect the brake pad wear sensor plug. Use a crowbar.
Please note!
Some cars are not equipped with the brake pad wear sensor.
Step 8
Disconnect the brake hose mounting bracket. Use a crowbar.
Step 9
Clean the stabiliser link fasteners. Use a wire brush. Use WD-40 spray.
Step 10
Unscrew the fastener connecting the stabilizer link to the stabilizer bar. Use a combination spanner #16. Use HEX No.H6. Use a ratchet wrench.
Step 11
Clean the fasteners connecting the shock strut to the steering knuckle. Use a wire brush. Use WD-40 spray.
Step 12
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 13
Remove the fastening bolts.
Step 14
Disconnect the steering knuckle from the shock absorber strut.
Step 15
Lower the car. Open the hood. Use a fender protection cover to prevent damaging paintwork and plastic parts of the car.
Step 16
Clean the fasteners of the shock strut upper mount. Use a wire brush. Use WD-40 spray.
Step 17
Loosen the upper fastener of the shock strut mount. Use a drive socket #E12. Use a ratchet wrench.
Step 18
Remove the coolant reservoir.
Step 19
Unscrew the top fastening of the shock strut mount.
Replacement: suspension strut – Mercedes W169. Tip from AUTODOC experts:
To avoid injuries, hold the shock strut when undoing the fastening bolts.
Step 20
Remove the suspension strut.
Step 21
Unscrew the fastener connecting the stabilizer link to the shock strut. Use a combination spanner #16. Use HEX No.H6. Use a ratchet wrench.
Step 22
Remove the stabilizer rod.
Step 23
Set the shock absorber strut on the spring compressor tool.
Note that when using a spring compressor, spring coils need to be securely gripped, compressing the spring on the opposite sides.Ensure the correct position of the spring in the retainer.Make sure that the spring coils tightly entered the lock handles.
Step 24
Compress the spring.
Step 25
Remove the protective cap from the shock absorber strut mount. Use flat screwdrivers (2 pieces).
Step 26
Treat the shock strut rod. Use a wire brush. Use WD-40 spray.
Step 27
Remove the strut piston rod nut. Use a drive socket #21. Use HEX No.H6. Use a ratchet wrench.
Step 28
Remove the top strut mount. Use a crowbar.
Step 29
Release the coil spring.
Step 30
Remove the spring.
Step 31
Remove the shock absorber dust cap and the bump stop.
AUTODOC recommends:
Replacement: suspension strut – Mercedes W169. Carefully inspect the mount, the boot, and the bump stop of the shock absorber. Replace if necessary.
Step 32
Remove the old shock absorber from the hydraulic coil spring compressor.
Before installing a new shock absorber you should pump it manually 3-5 times.
Step 33
Install the new shock absorber on the hydraulic coil spring compressor.
Step 34
Install the dust sleeve and the bump stop on the new shock absorber.
Step 35
Install the spring on the shock absorber. Compress the spring.
Step 36
Install the upper strut mount and the strut mount bearing.
Step 37
Tighten the shock strut piston rod nut. Use a drive socket #21. Use HEX No.H6. Use a torque wrench. Tighten it to 65 Nm torque.
Replacement: suspension strut – Mercedes W169. Tip from AUTODOC:
Check to make sure the spring is positioned correctly. Avoid its misalignment.
Step 38
Treat the shock strut rod. Use copper grease.
Step 39
Install the protective cap onto the shock absorber strut mount.
Step 40
Decompress the spring.
Step 41
Remove the assembled shock strut.
Step 42
Ιnstall the transverse stabilizer link.
Step 43
Tighten the fastener connecting the stabilizer link to the shock strut. Use a combination spanner #16. Use HEX No.H6. Use a ratchet wrench.
Step 44
Clean the mounting seats of the shock strut. Use a wire brush. Use WD-40 spray.
Step 45
Install the shock strut into the wheel arch.
Step 46
Tighten the shock strut top mount. Use a drive socket #E12. Use a torque wrench. Tighten it to 20 Nm torque.+45°
AUTODOC recommends:
Important! Be sure to use new fasteners.
Step 47
Treat the fasteners of the shock strut mount. Use copper grease.
Step 48
Install the coolant reservoir.
Step 49
Remove the fender protection cover. Close the hood.
Step 50
Raise the front of the car and secure on supports.
Step 51
Fix the shock absorber strut on the steering knuckle. Install the fastening bolts.
Step 52
Screw in the fastener that connects the shock strut to the steering knuckle.
Step 53
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 120 Nm torque.+90°
AUTODOC recommends:
Important! Be sure to use new fasteners.
Step 54
Secure the brake hose fastening bracket.
Step 55
Connect the brake pad wear sensor plug.
Step 56
Connect the ABS sensor wiring.
Step 57
Tighten the fastener connecting the stabilizer link to the stabilizer bar. Use a combination spanner #16. Use HEX No.H6. Use a torque wrench. Tighten it to 60 Nm torque.
Step 58
Treat the surface where the brake disc contacts the wheel rim. Use copper grease.
Step 59
Clean the brake disk surface. Use a brake cleaner.
It can track car expenses, keep a car log and replacement schedule, and save favourite materials, notes and documents
Install the AUTODOC CLUB app!
Your personal car expenses manager, maintenance tips, reminders about upcoming appointments and service intervals, DIY repair instructions – all this on your phone.
Scan
To download the app:
- scan the QR code
- download from App Store
- download from Google Play
Tips & tricks for your MERCEDES-BENZ A-Class (W169)
View more
DIY starter repair | AUTODOC tips
How to Make a DIY Foam Sprayer | AUTODOC tips
What to do if the airbag light is on | AUTODOC tips
Top 5 reasons why the suspension knocks | AUTODOC tips
Most commonly replaced car parts on MERCEDES-BENZ A-CLASS