How to carry out replacement: Control Arm CLS 350 d 4-matic (257.321) Mercedes C257
Disclaimer
Change Mercedes C257 CLS 350 EQ Boost 4-matic (257.351) Control Arm yourself – manuals and video tutorials

How to change rear lower arm on MERCEDES-BENZ CLS (C257) – replacement guide

downloads: 4
Views: 83
Download your free tutorial and fix MERCEDES-BENZ CLS (C257) CLS 220 d (257.314) problems yourself Download for free 2.02 MB Control Arm for Mercedes C257 Shop now
Leave a comment Open in a new tab
Important!
This replacement procedure can be used for:
MERCEDES-BENZ CLS (C257) CLS 450 EQ Boost 4-matic (257.359), MERCEDES-BENZ CLS (C257) CLS 350 d 4-matic (257.321), MERCEDES-BENZ CLS (C257) CLS 400 d 4-matic (257.323), MERCEDES-BENZ CLS (C257) CLS 350 d 4-matic (257.321), MERCEDES-BENZ CLS (C257) CLS 300 d (257.318), MERCEDES-BENZ CLS (C257) AMG CLS 53 EQ Boost 4-Matic+ (257.361), MERCEDES-BENZ CLS (C257) CLS 350 d (257.320), MERCEDES-BENZ CLS (C257) CLS 350 EQ Boost (257.350), MERCEDES-BENZ CLS (C257) CLS 350 EQ Boost 4-matic (257.351), MERCEDES-BENZ CLS (C257) CLS 400 d 4-matic (257.323), MERCEDES-BENZ CLS (C257) CLS 300 d 4-matic (257.319) … 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 CLS (C257) and other MERCEDES-BENZ models
Alternative products
How to change Suspension arm on Mercedes C257 CLS 350 d 4-matic (257.321) – step-by-step instructions for straightforward car repair Suspension arm
Tools
Replacement: rear lower arm – MERCEDES-BENZ CLS (C257). Tools you might need:
Wire brush
WD-40 spray
Brake cleaner
Ceramic grease
Copper grease
Torque wrench
Combination spanner #18
Drive socket # 10
Drive socket # 18
Torx bit E10
Torx bit E14
XZN socket bit # 12
Wheel impact socket #17
Ratchet wrench
Flat screwdriver
Hydraulic transmission jack
Wheel chock
Buy tools
Replacement: rear lower arm – MERCEDES-BENZ CLS (C257). Tip from AUTODOC:
  • The replacement procedure is identical for the left and right lower control arms.
  • Please note: all work on the car – MERCEDES-BENZ CLS (C257) – 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 C257 2017 - free PDF and video manuals
    Loosen the wheel mounting bolts. Use wheel impact socket #17.
  2. Step 3
    Raise the car.
    Replacement: rear lower arm – MERCEDES-BENZ CLS (C257). AUTODOC experts recommend:
    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 CLS (C257) CLS 350 d 4-matic (257.321) 2018 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 CLS (C257)
  3. Step 5
    Mercedes C257 CLS 450 EQ Boost 4-matic (257.359) 2019 Control Arm replacement: free workshop manuals
    Remove the wheel.
  4. Step 6
    Changing Control Arm on MERCEDES-BENZ CLS (C257) AMG CLS 53 EQ Boost 4-Matic+ (257.361) 2020 by yourself
    Unclip the fasteners and remove the suspension arm plastic cover. Use a flat screwdriver.
  5. Step 7
    How to remove MERCEDES-BENZ CLS CLS 300 d (257.318) 2021 Control Arm - online easy-to-follow instructions
    Unscrew the fasteners of the underbody plastic cover. Use a drive socket #10. Use a ratchet wrench.
  6. Step 8
    How to replace Control Arm on MERCEDES-BENZ CLS (C257) 2022: download PDF manuals and video instructions
    Clean all joints of the arm. Use a wire brush. Use WD-40 spray.
  7. Step 9
    How hard is it to do yourself: Control Arm replacement on Mercedes C257 CLS 350 d (257.320) 2023 - download illustrated guide
    Unscrew the fastener that connects the suspension arm to the stub axle. Use a combination spanner #18. Use XZN #12. Use a ratchet wrench.
  8. Step 10
    Need to know how to renew Control Arm on MERCEDES-BENZ CLS 2024? This free workshop manual will help you to do it yourself
    Remove the fastening bolt.
  9. Step 11
    Changing of Control Arm on Mercedes C257 2025 won't be an issue if you follow this illustrated step-by-step guide
    Clean the subframe bracket fasteners. Use a wire brush. Use WD-40 spray.
  10. Step 12
    MERCEDES-BENZ CLS CLS 350 EQ Boost 4-matic (257.351) Control Arm replacement: online guides and video tutorials
    Support the subframe. Use a hydraulic transmission jack.
  11. Step 13
    Replacing Control Arm on Mercedes C257 2018 CLS 350 d 4-matic (257.321) by yourself
    Unscrew the subframe bracket fasteners. This is necessary to access the upper fastening bolt of the suspension arm. Use Torx E10. Use Torx E14. Use a ratchet wrench.
  12. Step 14
    CLS (C257) CLS 300 d (257.318) 2019 Control Arm DIY replacement workshop manual
    Remove the fastening bolts.
  13. Step 15
    How to change Control Arm on MERCEDES-BENZ CLS (C257) 2020 - tips and tricks
    Remove the subframe bracket.
  14. Step 16
    Step-by-step recommendations for DIY replacement Mercedes C257 2021 CLS 300 d (257.318) Control Arm
    Unscrew the fastener connecting the control arm to the subframe. Use a combination spanner #18. Use XZN #12. Use a ratchet wrench.
  15. Step 17
    DIY replacement of Control Arm on MERCEDES-BENZ CLS (C257) CLS 400 d 4-matic (257.323) 2022 is not an issue anymore with our step-by-step tutorial
    Remove the fastening bolt.
  16. Step 18
    How to change Control Arm on Mercedes C257 2017 - free PDF and video manuals
    Remove the arm.
  17. Step 19
    How to replace MERCEDES-BENZ CLS (C257) CLS 350 d 4-matic (257.321) 2018 Control Arm - step-by-step manuals and video guides
    Clean the suspension arm mounting seats. Use a wire brush. Use WD-40 spray.
  18. Step 20
    Mercedes C257 CLS 450 EQ Boost 4-matic (257.359) 2019 Control Arm replacement: free workshop manuals
    Clean the subframe bracket mounting seats. Use a wire brush. Use WD-40 spray.
  19. Step 21
    Changing Control Arm on MERCEDES-BENZ CLS (C257) AMG CLS 53 EQ Boost 4-Matic+ (257.361) 2020 by yourself
    Install a new arm.
    Replacement: rear lower arm – MERCEDES-BENZ CLS (C257). Professionals recommend:
    During the installation process, use only new bolts and nuts.
  20. Step 22
    How to remove MERCEDES-BENZ CLS CLS 300 d (257.318) 2021 Control Arm - online easy-to-follow instructions
    Install the fastening bolts.
  21. Step 23
    How to replace Control Arm on MERCEDES-BENZ CLS (C257) 2022: download PDF manuals and video instructions
    Install the subframe bracket.
  22. Step 24
    How hard is it to do yourself: Control Arm replacement on Mercedes C257 CLS 350 d (257.320) 2023 - download illustrated guide
    Install the fastening bolts.
  23. Step 25
    Need to know how to renew Control Arm on MERCEDES-BENZ CLS 2024? This free workshop manual will help you to do it yourself
    Tighten the subframe bracket fasteners. Use Torx E10. Use a torque wrench. Tighten it to 28 Nm torque.
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
Need New Tyres?

Find out which tyre and wheel sizes are compatible with the MERCEDES-BENZ CLS (C257) model

Mercedes C257 tyre size

Popular maintenance tutorials for Mercedes C257

More manuals for Mercedes C257

Complete guides for changing the Control arm on different MERCEDES-BENZ CLS models

Unlock your car maintenance assistant!

Track expenses, manage logs, schedule replacements, and more.

DIY MERCEDES-BENZ CLS (C257) Control Arm replacement - online guide
Tips & tricks for your MERCEDES-BENZ CLS (C257)
View more
  • How to change Control arm on MERCEDES-BENZ CLS (C257) CLS 400 d 4-matic (257.323) - replacement tricks
    Top 4 Car Cleaning Products to Protect Your Car's Body | AUTODOC Tips
    2K views
    Published on: 26/08/2021
  • Changing Wishbone Mercedes C257 CLS 350 d 4-matic (257.321) - Replacement Tips
    Top 7 signs of a bad starter
    5K views
    Published on: 20/03/2025
  • Maintenance Hacks - MERCEDES-BENZ CLS (C257) CLS 450 EQ Boost 4-matic (257.359) Control arms replacement guide
    Cold starts | 5 mistakes that wreck your car
    12K views
    Published on: 23/10/2025
  • Replace Trailing arm on Mercedes C257 - free video tips
    How to remove rust | AUTODOC tips
    27K views
    Published on: 16/09/2021

Most commonly replaced car parts on MERCEDES-BENZ CLS

Professional manuals for the most common MERCEDES-BENZ models

ОЕ number
Autodoc CLUB App icon
Time to replace parts? Get even better deals in our Shop app.
MERCEDES-BENZ CLS (C257) Control Arm replace by yourself - Scan QR-code and download AUTODOC CLUB app
SCAN ME