Replacement: front lower arm – Mercedes W201. AUTODOC recommends:
The replacement procedure is identical for the left and right lower control arms.
Please note: all work on the car – Mercedes W201 – should be done with the engine switched off.
Carry out replacement in the following order:
Step 1
Secure the wheels with chocks.
Step 2
Loosen the wheel bolts. Use wheel impact socket #17. Use a tap wrench.
Step 3
Raise the car.
Replacement: front lower arm – Mercedes W201. AUTODOC recommends:
If you are using a jack, make sure it rests on a flat surface without any unevenness.Be sure to additionally secure the car with jack stands.
Step 4
Unscrew the wheel bolts.
AUTODOC recommends:
To avoid injury, hold up the wheel when unscrewing the bolts.
Step 5
Remove the wheel.
Step 6
Clean the fasteners of the stabilizer bush brackets. Use a wire brush. Use WD-40 spray.
Step 7
Unscrew the fasteners of the stabilizer bush brackets. Use a combination spanner #13. Use a drive socket #13. Use a ratchet wrench.
Step 8
Remove the fastening bolts.
Step 9
Remove the stabilizer bush brackets.
Step 10
Detach the anti-roll bar from the suspension arms.
Step 11
Install the coil spring compressor on the coil spring.
Replacement: front lower arm – Mercedes W201. Professionals recommend:
Use adapters and jaws of the appropriate size.The sping coils should be securely fixed with the coil spring compressor.Use high quality coil spring compressors.
Step 12
Support the control arm. Use a hydraulic transmission jack.
Step 13
Compress the spring.
AUTODOC recommends:
Be careful. The compressed spring is powerful and can cause injury if it comes loose.
Step 14
Clean all joints of the arm. Use a wire brush. Use WD-40 spray.
Step 15
Make marks on the camber bolts.
Step 16
Unscrew the front fastener of the control arm. Use a combination spanner #22. Use a drive socket #22. Use a ratchet wrench.
Step 17
Unscrew the rear fastener of the control arm. Use a combination spanner #22. Use a drive socket #22. Use a ratchet wrench.
Step 18
Unscrew the fastener connecting the ball joint to the steering knuckle. Use a combination spanner #19. Use a drive socket #19. Use a ratchet wrench.
Step 19
Remove the fastening bolt.
Step 20
Remove the support from under the control arm.
Step 21
Remove the coil spring together with the coil spring compressor.
Replacement: front lower arm – Mercedes W201. Tip from AUTODOC experts:
While the spring is compressed, do not do any operations on it.
Step 22
Disconnect the ball joint from the steering knuckle. Use a flat metal-working chisel. Use a hammer.
Step 23
Remove the fastening bolts. Use a pin punch. Use a hammer.
Step 24
Remove the control arm. Use a crowbar.
Step 25
Clean the suspension arm mounting seats. Use a wire brush. Use all-purpose cleaning spray.
Step 26
Install the new control arm.
AUTODOC recommends:
During the installation process, use only new bolts and nuts.
Step 27
Install the fastening bolts.
Step 28
Connect the ball joint to the steering knuckle. Use a rubber mallet.
Step 29
Support the control arm. Use a hydraulic transmission jack.
Step 30
Install the fastening bolt.
Step 31
Install the spring together with the compressor.
Replacement: front lower arm – Mercedes W201. Tip from AUTODOC:
Make sure that the coil spring is correctly positioned in its mounting seats.
Step 32
Screw the fastener connecting the ball joint to the steering knuckle. Use a combination spanner #19. Use a drive socket #19. Use a ratchet wrench.
Step 33
Decompress the spring.
Step 34
Remove the coil spring compressor.
Step 35
For tightening the fasteners correctly, you have to jack up the suspension components to their working position.
Step 36
Adjust the position of the camber bolts according to the marks.
Step 37
Tighten the rear fastener of the control arm. Use a combination spanner #22. Use a drive socket #22. Use a torque wrench. Tighten it to 120 Nm torque.
Step 38
Tighten the front fastener of the arm. Use a combination spanner #22. Use a drive socket #22. Use a torque wrench. Tighten it to 120 Nm torque.
Step 39
Tighten the fastener connecting the ball joint to the steering knuckle. Use a combination spanner #19. Use a drive socket #19. Use a torque wrench. Tighten it to 75 Nm torque.
Step 40
Remove the support from under the control arm.
AUTODOC recommends:
Replacement: front lower arm – Mercedes W201. Lower the transmission jack smoothly, without jerks, to avoid damaging components and mechanisms.
Step 41
Attach the anti-roll bar to the suspension arms. Use a crowbar.
Step 42
Install the stabilizer bush brackets. Use water pump pliers.
Step 43
Install the fastening bolts.
Step 44
Tighten the fasteners on the anti-roll bar bush brackets. Use a combination spanner #13. Use a drive socket #13. Use a torque wrench. Tighten it to 20 Nm torque.
Step 45
Clean the wheel rim mounting seat. Use a wire brush. Use all-purpose cleaning spray.
Step 46
Treat the surface where the brake disc contacts the wheel rim. Use ceramic grease.
Step 47
Install the wheel.
AUTODOC recommends:
To avoid injury, hold up the wheel when screwing in the fastening bolts.
Step 48
Screw in the wheel bolts. Use wheel impact socket #17. Use a ratchet wrench.
Step 49
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 50
Remove the jacks and chocks.
Was this manual helpful?
Please rate this manual on a scale from 1 to 5. If you have any questions, feel free to ask us.
Users voted – 0
Searching for the right tyres?
Find out which tyre and wheel sizes are compatible with the MERCEDES-BENZ 190 (W201) model.
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 190 (W201)
View more
DIY starter repair | AUTODOC tips
How to detect vacuum leaks using a smoke machine | AUTODOC
How to clean an engine bay | AUTODOC
4 reasons why your CHECK ENGINE light is on | AUTODOC tips
Most commonly replaced car parts on MERCEDES-BENZ 190