How to carry out replacement: Control Arm 200 2.0 (172.434) Mercedes R172
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Change Mercedes R172 300 2.0 (172.438) Control Arm yourself – manuals and video tutorials

How to change front lower arm on MERCEDES-BENZ SLC (R172) – replacement guide

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Important!
This replacement procedure can be used for:
MERCEDES-BENZ SLC (R172) AMG SLC 43 3.0 (172.466), MERCEDES-BENZ SLC (R172) AMG SLC 43 (172.466), MERCEDES-BENZ SLC (R172) 300 (172.438), MERCEDES-BENZ SLC (R172) 200 (172.434), MERCEDES-BENZ SLC (R172) 180 (172.431), MERCEDES-BENZ SLC (R172) 250 d (172.404) … 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 SLC (R172) and other MERCEDES-BENZ models
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Tools
Replacement: front lower arm – MERCEDES-BENZ SLC (R172). List of the tools you'll need:
Wire brush
WD-40 spray
Brake cleaner
Ceramic grease
Copper grease
Torque wrench
Combination spanner #21
Combination spanner #22
Torx bit E20
Wheel impact socket #17
Ratchet wrench
Ball joint puller
Hydraulic transmission jack
Wheel chock
Buy tools
Replacement: front lower arm – MERCEDES-BENZ SLC (R172). Tip from AUTODOC experts:
  • The replacement procedure is identical for the left and right lower control arms.
  • Please note: all work on the car – MERCEDES-BENZ SLC (R172) – should be done with the engine switched off.
Carry out replacement in the following order:
  1. Step 1
    Secure the wheels with chocks.
    Step 2
    How to change Control Arm on Mercedes R172 2016 - free PDF and video manuals
    Loosen the wheel mounting bolts. Use wheel impact socket #17.
  2. Step 3
    Raise the car.
    Replacement: front lower arm – MERCEDES-BENZ SLC (R172). 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
    How to replace MERCEDES-BENZ SLC (R172) 200 2.0 (172.434) 2017 Control Arm - step-by-step manuals and video guides
    Unscrew the wheel bolts.
    AUTODOC recommends:
    Warning! To avoid injury, hold the wheel while unscrewing the fastening bolts. MERCEDES-BENZ SLC (R172)
  3. Step 5
    Mercedes R172 180 1.6 (172.431) 2018 Control Arm replacement: free workshop manuals
    Remove the wheel.
  4. Step 6
    Changing Control Arm on MERCEDES-BENZ SLC (R172) AMG SLC 43 3.0 (172.466) 2019 by yourself
    Clean all joints of the arm. Use a wire brush. Use WD-40 spray.
  5. Step 7
    How to remove MERCEDES-BENZ SLC 250 d 2.1 (172.404) 2020 Control Arm - online easy-to-follow instructions
    Unscrew the fastener connecting the control arm to the subframe. Use a combination spanner #21. Use Torx E20. Use a ratchet wrench.
  6. Step 8
    How to replace Control Arm on MERCEDES-BENZ SLC (R172) 2021: download PDF manuals and video instructions
    Unscrew the ball joint fastening to the steering knuckle. Use a combination spanner #21.
  7. Step 9
    How hard is it to do yourself: Control Arm replacement on Mercedes R172 200 2.0 (172.434) 2022 - download illustrated guide
    Prop up the steering knuckle. Use a hydraulic transmission jack.
  8. Step 10
    Need to know how to renew Control Arm on MERCEDES-BENZ SLC 2023? This free workshop manual will help you to do it yourself
    Disconnect the ball joint from the steering knuckle. Use a ball joint puller.
  9. Step 11
    Changing of Control Arm on Mercedes R172 2024 won't be an issue if you follow this illustrated step-by-step guide
    Remove the support from under the steering knuckle.
    AUTODOC recommends:
    Replacement: front lower arm – MERCEDES-BENZ SLC (R172). Lower the transmission jack smoothly, without jerks, to avoid damaging components and mechanisms.
  10. Step 12
    MERCEDES-BENZ SLC 300 2.0 (172.438) Control Arm replacement: online guides and video tutorials
    Remove the fastening bolt.
  11. Step 13
    Replacing Control Arm on Mercedes R172 2017 200 2.0 (172.434) by yourself
    Remove the arm.
  12. Step 14
    SLC (R172) 250 d 2.1 (172.404) 2018 Control Arm DIY replacement workshop manual
    Clean the suspension arm mounting seats. Use a wire brush. Use WD-40 spray.
  13. Step 15
    How to change Control Arm on MERCEDES-BENZ SLC (R172) 2019 - tips and tricks
    Install a new arm.
    Replacement: front lower arm – MERCEDES-BENZ SLC (R172). Tip from AUTODOC:
    During the installation process, use only new bolts and nuts.
  14. Step 16
    Step-by-step recommendations for DIY replacement Mercedes R172 2020 250 d 2.1 (172.404) Control Arm
    Install the fastening bolt.
  15. Step 17
    DIY replacement of Control Arm on MERCEDES-BENZ SLC (R172) 300 2.0 (172.438) 2021 is not an issue anymore with our step-by-step tutorial
    Connect the ball joint to the steering knuckle.
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