Important!
This replacement procedure can be used for:
MERCEDES-BENZ A-Class (W169) A 200 (169.033, 169.333), MERCEDES-BENZ B-Class (W245) B 200 (245.233)

The steps may slightly vary depending on the car design.

How to replace front suspension arm on MERCEDES-BENZ B200 (W245) [TUTORIAL AUTODOC]

Required tools:
Required tools:
Wire brush
WD-40 spray
Brake cleaner
Copper grease
Combination spanner #21
Combination spanner #22
Drive socket # 10
Drive socket # 14
Drive socket # E18
Wheel impact socket #H12
Ratchet wrench
Torque wrench
Crow bar
Ball joint puller
Hydraulic transmission jack
Wheel chock
AUTODOC recommends:
  • The replacement procedure is identical for the left and right lower control arms.
  • All work should be done with the engine stopped.
Carry out replacement in the following order:
  1. How to change Control Arm on Mercedes W245 2004 - free PDF and video manuals
    Step 1
    Secure the wheels with chocks.
  2. How to replace MERCEDES-BENZ B-Class (W245) B 180 CDI 2.0 (245.207) 2005 Control Arm - step-by-step manuals and video guides
    Step 2
    Loosen the wheel mounting bolts.Use wheel impact socket #H12.
  3. Mercedes W245 B 200 CDI 2.0 (245.208) 2006 Control Arm replacement: free workshop manuals
    Step 3
    Raise the front of the car and secure on supports.
  4. Changing Control Arm on MERCEDES-BENZ B-Class (W245) B 200 2.0 (245.233) 2007 by yourself
    Step 4
    Unscrew the wheel bolts.
    AUTODOC recommends:
    To avoid injury, hold up the wheel when unscrewing the bolts.
  5. How to remove MERCEDES-BENZ B-CLASS B 150 1.5 (245.231) 2008 Control Arm - online easy-to-follow instructions
    Step 5
    Remove the wheel.
  6. How to replace Control Arm on MERCEDES-BENZ B-Class (W245) 2009: download PDF manuals and video instructions
    Step 6
    Clean all joints of the arm.Use a wire brush.Use WD-40 spray.
    AUTODOC recommends:
    After applying the spray, wait a few minutes.
  7. How hard is it to do yourself: Control Arm replacement on Mercedes W245 B 180 1.7 (245.232) 2010 - download illustrated guide
    Step 7
    Unscrew and remove the wheel arch cover fasteners.Use a drive socket #10.Use a ratchet wrench.
  8. Need to know how to renew Control Arm on MERCEDES-BENZ B-CLASS ? This free workshop manual will help you to do it yourself
    Step 8
    Clean all joints of the arm.Use a wire brush.Use WD-40 spray.
    AUTODOC recommends:
    After applying the spray, wait a few minutes.
  9. Changing of Control Arm on Mercedes W245 2012 won't be an issue if you follow this illustrated step-by-step guide
    Step 9
    Unscrew the front arm fastener. Use a combination spanner #21.Use a drive socket #E18.Use a ratchet wrench.
  10. MERCEDES-BENZ B-CLASS B 170 NGT 2.0 (245.233) Control Arm replacement: online guides and video tutorials
    Step 10
    Remove the front fastener of the control arm.
  11. Replacing Control Arm on Mercedes W245 2005 B 180 CDI 2.0 (245.207) by yourself
    Step 11
    Unscrew the rear fastener connecting the control arm to the subframe.Use a combination spanner #21.Use a drive socket #E18.Use a ratchet wrench.
  12. B-Class (W245) B 150 1.5 (245.231) 2006 Control Arm DIY replacement workshop manual
    Step 12
    Unscrew the ball joint fastening to the steering knuckle.Use a combination spanner #21.
  13. How to change Control Arm on MERCEDES-BENZ B-Class (W245) 2007 - tips and tricks
    Step 13
    Disconnect the lower arm from the steering knuckle.Use a ball joint puller.
  14. Step-by-step recommendations for DIY replacement Mercedes W245 2008 B 150 1.5 (245.231) Control Arm
    Step 14
    Remove the rear fastener of the control arm.
    Step 15
    Remove the arm.
  15. DIY replacement of Control Arm on MERCEDES-BENZ B-Class (W245) B 170 1.7 (245.232) 2009 is not an issue anymore with our step-by-step tutorial
    Step 16
    Clean the mounting seats and the thread of the suspension arm. Use a wire brush.Use WD-40 spray.
  16. How to change Control Arm on Mercedes W245 2004 - free PDF and video manuals
    Step 17
    Install a new arm.Use a crowbar.
    AUTODOC recommends:
    During the installation process, use only new bolts and nuts.Do not damage the ball joint cover.
    Step 18
    Install the rear fastener of the control arm.
  17. How to replace MERCEDES-BENZ B-Class (W245) B 180 CDI 2.0 (245.207) 2005 Control Arm - step-by-step manuals and video guides
    Step 19
    Connect the lower arm to the steering knuckle.
  18. Mercedes W245 B 200 CDI 2.0 (245.208) 2006 Control Arm replacement: free workshop manuals
    Step 20
    Install the front fastener of the arm.
  19. Changing Control Arm on MERCEDES-BENZ B-Class (W245) B 200 2.0 (245.233) 2007 by yourself
    Step 21
    Support the arm. Use a hydraulic transmission jack.
  20. How to remove MERCEDES-BENZ B-CLASS B 150 1.5 (245.231) 2008 Control Arm - online easy-to-follow instructions
    Step 22
    Tighten the fasteners of the ball joint.Use a combination spanner #22.Use a torque wrench.Tighten it to 65 nm torque.
  21. How to replace Control Arm on MERCEDES-BENZ B-Class (W245) 2009: download PDF manuals and video instructions
    Step 23
    Tighten the front fastener connecting the control arm to the subframe. Use a combination spanner #21.Use a drive socket #E18.Use a torque wrench.Tighten it to 90 Nm torque.
  22. How hard is it to do yourself: Control Arm replacement on Mercedes W245 B 180 1.7 (245.232) 2010 - download illustrated guide
    Step 24
    Tighten the rear fastener connecting the arm to the body subframe.Use a combination spanner #21.Use a drive socket #E18.Use a torque wrench.Tighten it to 90 Nm torque.
  23. Need to know how to renew Control Arm on MERCEDES-BENZ B-CLASS ? This free workshop manual will help you to do it yourself
    Step 25
    Remove the support from under the arm.
    AUTODOC recommends:
    Lower the hydraulic transmission jack smoothly, without jerks, to avoid damaging assemblies and mechanisms.
  24. Changing of Control Arm on Mercedes W245 2012 won't be an issue if you follow this illustrated step-by-step guide
    Step 26
    Treat all joints of the arm.Use copper grease.
  25. MERCEDES-BENZ B-CLASS B 170 NGT 2.0 (245.233) Control Arm replacement: online guides and video tutorials
    Step 27
    Tighten the fasteners of the ball joint.Use a drive socket #14.Use a torque wrench.Tighten it to 50 nm torque.
  26. Replacing Control Arm on Mercedes W245 2005 B 180 CDI 2.0 (245.207) by yourself
    Step 28
    Treat all joints of the arm.Use copper grease.
  27. B-Class (W245) B 150 1.5 (245.231) 2006 Control Arm DIY replacement workshop manual
    Step 29
    Install and tighten the wheel arch cover fasteners.Use a drive socket #10.Use a ratchet wrench.
  28. How to change Control Arm on MERCEDES-BENZ B-Class (W245) 2007 - tips and tricks
    Step 30
    Treat the surface where the brake disc contacts the wheel rim. Use copper grease.
  29. Step-by-step recommendations for DIY replacement Mercedes W245 2008 B 150 1.5 (245.231) Control Arm
    Step 31
    Clean the brake disk surface.Use a brake cleaner.
    AUTODOC recommends:
    After applying the spray, wait a few minutes.
  30. DIY replacement of Control Arm on MERCEDES-BENZ B-Class (W245) B 170 1.7 (245.232) 2009 is not an issue anymore with our step-by-step tutorial
    Step 32
    Install the wheel.
    AUTODOC recommends:
    To avoid injury, hold up the wheel when screwing in the fastening bolts.
  31. How to change Control Arm on Mercedes W245 2004 - free PDF and video manuals
    Step 33
    Screw in the wheel bolts.Use wheel impact socket #H12.
  32. How to replace MERCEDES-BENZ B-Class (W245) B 180 CDI 2.0 (245.207) 2005 Control Arm - step-by-step manuals and video guides
    Step 34
    Lower the car and working in a cross order, tighten the wheel bolts.Use wheel impact socket #H12.Use a torque wrench.Tighten it to 125 Nm torque.
  33. Mercedes W245 B 200 CDI 2.0 (245.208) 2006 Control Arm replacement: free workshop manuals
    Step 35
    Remove the jacks and chocks.
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DIY MERCEDES-BENZ B-Class (W245) Control Arm replacement - online guide
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