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How to change front lower arm on MERCEDES-BENZ W124 Convertible (A124) – replacement guide
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Important!
This replacement procedure can be used for:
MERCEDES-BENZ W124 Convertible (A124) 300 CE-24 (124.061), MERCEDES-BENZ W124 Convertible (A124) 300 CE-24 (124.061) … View more
The steps may slightly vary depending on the car design.
MERCEDES-BENZ W124 Convertible (A124) 300 CE-24 (124.061), MERCEDES-BENZ W124 Convertible (A124) 300 CE-24 (124.061) … View more
The steps may slightly vary depending on the car design.
This video shows the replacement procedure of a similar car part on another vehicle
All the parts you need to replace – Control Arm for W124 Convertible (A124) and other MERCEDES-BENZ models
Alternative products

Wire brush
WD-40 spray
All-purpose cleaning spray
Ceramic grease
Torque wrench
Combination spanner #18
Combination spanner #22
Drive socket # 13
Drive socket # 19
Drive socket # 22
Wheel impact socket #17
Ratchet wrench
Tap wrench
Hammer
Pin punch
Crow bar
Rubber mallet
Strut spring compressor
Hydraulic transmission jack
Wheel chock
Replacement: front lower arm – MERCEDES-BENZ CABRIOLET (A124). AUTODOC experts recommend:
- The replacement procedure is identical for the left and right lower control arms.
- All work should be done with the engine stopped.
Replacement: front lower arm – MERCEDES-BENZ CABRIOLET (A124). Recommended sequence of steps:
- Step 1Secure the wheels with chocks.Step 2
Loosen the wheel bolts. Use wheel impact socket #17. Use a tap wrench. - Step 3Raise the car.Replacement: front lower arm – MERCEDES-BENZ CABRIOLET (A124). 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
Install the coil spring compressor on the coil spring.Replacement: front lower arm – MERCEDES-BENZ CABRIOLET (A124). 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 7
Compress the spring.AUTODOC recommends:Be careful. The compressed spring is powerful and can cause injury if it comes loose. - Step 8
Clean all joints of the arm. Use a wire brush. Use WD-40 spray. - Step 9
Make marks on the camber bolts. - Step 10
Unscrew the rear fastener of the control arm. Use a combination spanner #22. Use a drive socket #22. Use a ratchet wrench. - Step 11
Unscrew the front fastener of the control arm. Use a combination spanner #22. Use a drive socket #22. Use a ratchet wrench. - Step 12
Unscrew the fasteners connecting the anti-roll bar bracket to the control arm. Use a drive socket #13. Use a ratchet wrench. - Step 13
Detach the anti-roll bar from the control arm. - Step 14
Unscrew the fastener connecting the ball joint to the steering knuckle. Use a combination spanner #18. Use a drive socket #19. Use a ratchet wrench. - Step 15
Remove the fastening bolt. - Step 16
Disconnect the ball joint from the steering knuckle. - Step 17
Remove the fastening bolts. Use a pin punch. Use a hammer. - Step 18
Remove the coil spring together with the coil spring compressor.Replacement: front lower arm – MERCEDES-BENZ CABRIOLET (A124). Tip from AUTODOC experts:While the spring is compressed, do not do any operations on it. - Step 19
Remove the control arm. Use a crowbar. - Step 20
Clean the suspension arm mounting seats. Use a wire brush. Use all-purpose cleaning spray. - Step 21
Install the new control arm.AUTODOC recommends:During the installation process, use only new bolts and nuts. - Step 22
Connect the ball joint to the steering knuckle. - Step 23
Install the fastening bolt. - Step 24
Support the control arm. Use a hydraulic transmission jack. - Step 25
Install the spring together with the compressor.Replacement: front lower arm – MERCEDES-BENZ CABRIOLET (A124). Tip:Make sure that the coil spring is correctly positioned in its mounting seats. - Step 26
Position the control arm according to its mounting holes. Use a rubber mallet.
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