Knocking Noise Over Bumps Due to Worn Sway Bar Link Joints on Mercedes-Benz C240 4MATIC

The sway bar end link joints may wear and cause a knocking noise over bumps. Loose or warn links should be replaced to correct this type of noise.

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Average mileage: 100,833 (50,000–168,000)
3 model years affected: 2003, 2004, 2005
12 people reported this problem
3 people shared problem details
Worn Sway Bar Link Joint Causing Knocking Over Bumps
Make noise going over bumps.
Misdiagnosed. Had to change control arm before it was properly diagnosed
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