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How to change front lower arm on Mercedes W203 – replacement guide
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Important!
This replacement procedure can be used for:
MERCEDES-BENZ C-Class Saloon (W203) C 180 (203.035), MERCEDES-BENZ C-Class Saloon (W203) C 200 Kompressor (203.045), MERCEDES-BENZ C-Class Saloon (W203) C 320 (203.064), MERCEDES-BENZ C-Class Saloon (W203) C 200 CDI (203.004), MERCEDES-BENZ C-Class Saloon (W203) C 270 CDI (203.016), MERCEDES-BENZ C-Class Saloon (W203) C 220 CDI (203.006, 203.008), MERCEDES-BENZ C-Class Saloon (W203) C 180 Kompressor (203.046), MERCEDES-BENZ C-Class Saloon (W203) C 200 Kompressor (203.042), MERCEDES-BENZ C-Class Saloon (W203) C 200 CDI (203.007), MERCEDES-BENZ C-Class Saloon (W203) C 200 CGI Kompressor (203.043), MERCEDES-BENZ C-Class Saloon (W203) C 230 Kompressor (203.040), MERCEDES-BENZ C-Class Saloon (W203) C 220 CDI (203.008), MERCEDES-BENZ C-Class Saloon (W203) C 320 CDI (203.020), MERCEDES-BENZ C-Class Saloon (W203) C 280 (203.054), MERCEDES-BENZ C-Class Saloon (W203) C 350 (203.056), MERCEDES-BENZ C-Class Saloon (W203) C 230 (203.052) … View more
The steps may slightly vary depending on the car design.
MERCEDES-BENZ C-Class Saloon (W203) C 180 (203.035), MERCEDES-BENZ C-Class Saloon (W203) C 200 Kompressor (203.045), MERCEDES-BENZ C-Class Saloon (W203) C 320 (203.064), MERCEDES-BENZ C-Class Saloon (W203) C 200 CDI (203.004), MERCEDES-BENZ C-Class Saloon (W203) C 270 CDI (203.016), MERCEDES-BENZ C-Class Saloon (W203) C 220 CDI (203.006, 203.008), MERCEDES-BENZ C-Class Saloon (W203) C 180 Kompressor (203.046), MERCEDES-BENZ C-Class Saloon (W203) C 200 Kompressor (203.042), MERCEDES-BENZ C-Class Saloon (W203) C 200 CDI (203.007), MERCEDES-BENZ C-Class Saloon (W203) C 200 CGI Kompressor (203.043), MERCEDES-BENZ C-Class Saloon (W203) C 230 Kompressor (203.040), MERCEDES-BENZ C-Class Saloon (W203) C 220 CDI (203.008), MERCEDES-BENZ C-Class Saloon (W203) C 320 CDI (203.020), MERCEDES-BENZ C-Class Saloon (W203) C 280 (203.054), MERCEDES-BENZ C-Class Saloon (W203) C 350 (203.056), MERCEDES-BENZ C-Class Saloon (W203) C 230 (203.052) … View more
The steps may slightly vary depending on the car design.
How to change front suspension arm on MERCEDES-BENZ W203 C-Class [TUTORIAL AUTODOC]

All the parts you need to replace – Control Arm for C-Class Saloon (W203) and other MERCEDES-BENZ models
Suspension arm
Alternative products

Wire brush
WD-40 spray
Brake cleaner
Copper grease
Torque wrench
Combination spanner #21
Combination spanner #22
Drive socket # 8
Drive socket # 21
Wheel impact socket #17
Ratchet wrench
Ball joint puller
Hydraulic transmission jack
Wheel chock
Replacement: front lower arm – Mercedes W203. AUTODOC recommends:
- The replacement procedure is identical for the left and right lower control arms.
- Please note: all work on the car – Mercedes W203 – should be done with the engine switched off.
Carry out replacement in the following order:
- Step 1Secure the wheels with chocks.
- Step 2Loosen the wheel mounting bolts. Use wheel impact socket #17.
- Step 3Raise the front of the car and secure on supports.
- Step 4Unscrew the wheel bolts.AUTODOC recommends:Warning! To avoid injury, hold the wheel while unscrewing the fastening bolts. Mercedes W203
- Step 5Remove the wheel.
- Step 6Undo the fasteners of the oil pan lower cover. Use a drive socket #8. Use a ratchet wrench.
- Step 7Remove the oil pan cover.
- Step 8Clean all joints of the arm. Use a wire brush. Use WD-40 spray.AUTODOC recommends:Replacement: front lower arm – Mercedes W203. After applying the spray, wait a few minutes.
- Step 9Unscrew the fastener connecting the control arm to the subframe. Use a combination spanner #21. Use a drive socket #21. Use a ratchet wrench.
- Step 10Clean all joints of the arm. Use a wire brush. Use WD-40 spray.AUTODOC recommends:Replacement: front lower arm – Mercedes W203. After applying the spray, wait a few minutes.
- Step 11Unscrew the fastener connecting the ball joint to the steering knuckle. Use a combination spanner #21.
- Step 12Disconnect the ball joint from the steering knuckle. Use a ball joint puller.
- Step 13Remove the fastening bolt.
- Step 14Remove the arm.
- Step 15Clean the mounting seats and the thread of the suspension arm. Use a wire brush. Use WD-40 spray.
- Step 16Install a new arm.Replacement: front lower arm – Mercedes W203. Professionals recommend:During the installation process, use only new bolts and nuts.Do not damage the ball joint cover.
- Step 17Install the fastening bolt.
- Step 18Connect the ball joint to the steering knuckle.
- Step 19Screw the fastener connecting the ball joint to the steering knuckle. Use a combination spanner #22.
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