Squeaky front suspension?

2007 MERCEDES BENZ S600
200,000 MILES • 6.0L • V12 • TURBO • 2WD • AUTOMATIC
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JUN841NC
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  • 28 POSTS
Good day.. Having a problem with vehicle mentioned above.. 2007 face-lift Mb W221 s600 with active body control (abc).. Vehicle developed a squeaky, cracking, clunky sound from left front side.. Took it to a local workshop, was advised it's lower control arm bushes had the entire lower control arm replaced.. Had the same problem after replacing was again advised to replace upper control arm which I did and to my surprise same sound still availed.. The technician then advised me it is the entire strut (shock) that's failed which I replaced reluctantly and sound is still there.. I went to another workshop after spending so much money my problem still persists, the workshop technician did some tests and advised to replace right hand side lower control arm, right hand side upper control arm which I did and again after replacing same sound.. I took vehicle back and was advised to replace right hand side strut mounting rubber it's wedged in between top side of strut.. I'm at wits end I've spent so much money fixing this.. Could you please send help..
Apr 5, 2026 at 9:02 PM
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What to check next

Diagnostic guidance. Suggested checks and possible repairs are separate from the owner's reported results.

Give an appropriately equipped suspension specialist the complete list of replacements and ask for the noise to be reproduced and localized before authorizing more parts. Discuss whether a drive-on rack would help reproduce the conditions described in the thread. Have the technician identify the components actually fitted to this ABC-equipped vehicle. The contributor's list of possible bushings and links is a set of suggestions, not confirmation of the vehicle's hardware or the noise source.

Guidance references and applicability

2CarPros: Original discussion 1712507 https://2carpros.com/questions/squeaky-suspension-76176938 Source for the owner's reported history and outcome. Contributor suggestions are not independently confirmed diagnoses. No attachment content was verified.

Read the replies · Discussion summary and reported outcome

AI-ASSISTED GUIDANCE · REVIEWED BY 2CARPROS
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CANNON1349
  • ✓Experienced Mechanic
  • 861 POSTS
Hello, any notable oil leaks getting on the suspension parts? Nobody seems to have mentioned sway bar bushings or links, or even subframe bushings. Does this noise appear only over bumps or in specific scenarios?

William
Apr 6, 2026 at 10:35 AM
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JUN841NC
  • MEMBER
  • 28 POSTS
Good day yes there were oil leaks but it came from the struts replaced both left and right hand strut hoses.. Leak seems to has disappeared noise still persists.. Will have them look at what you have mentioned starting to gighlty doubt it's control arms or struts..
Apr 6, 2026 at 4:31 PM
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CANNON1349
  • ✓Experienced Mechanic
  • 861 POSTS
Some of these are difficult to replicate noises when on a lift. See if the shop has a drive-on rack where they can test with the vehicle's weight on the rack.

William
Apr 7, 2026 at 3:13 AM

Discussion summary

Squeaky front suspension?

The owner of a 2007 Mercedes-Benz S600 with Active Body Control reported persistent front suspension squeaks, cracking and clunks despite multiple control-arm and strut-related replacements. The owner said leaks appeared to stop after strut-hose work, but the noise remained. A contributor suggested further inspection with the suspension carrying vehicle weight.

Reported outcome: The owner reported that the leak appeared resolved but the suspension noise persisted.

No noise recording, measured play, confirmed failed component or successful noise repair was supplied. This summary does not provide an ABC hydraulic service or lifting procedure.

Read the original discussion

AI-ASSISTED SUMMARY · REVIEWED BY 2CARPROS
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