Knocking Noise Over Bumps Due to Worn Sway Bar Link Joints on Mercedes-Benz C230

Problem Description and Possible Solution

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.

Problem Data
RepairPal Verified
Average mileage: 91,000 (82,000–100,000)
6 model years affected: 2002, 2003, 2004, 2005, more2006, 2007
11 people reported this problem
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Every time I go over a bump I get a loud knocking noise coming from the driver's side.
Banging over bumps replaced swaybar links and front brakes