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

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: 99,455 (41,000–230,000)
5 model years affected: 2001, 2002, 2003, 2004, more2005
35 people reported this problem
Viewing 1 - 14 of 14 comments
major knocking over bumps at the front end
C240 4-matic wagon. Clunking or knocking sound coming from rear when going over rough road surface or small bumps. Not noticeable at higher speeds.
noise in rear after riding over road ruts or bumps
When driving over bumps at low speeds, I hear a squeaking from under the car. Still has not been addresses. Any clues to the problem and cost of repair?
Rear Knocking when going over bumps
kocking in front of car when going over bumps. link for sway bar was broken and replaced. it solved the problem.
Rear driver sway bar links
Only knocks over bumps
suspension knocks when going over bumps. car has done it since I bought it at 120000 miles.
Same type of issue,even on flat roads, had cat checked, new brake pads, sway bar end links checked, still there, could it be from wrong brake pads just installed " did not turn rotors"... Driving me nuts.... Only on hot car after driven for a while
Identical problem,
Asked our mechanic to check the sway bar joints and sure enough, they were broken and needed to be replaced. Car rides a bit smoother now they've been fixed.
have not fix
sway bar worn. replaced and all is good.
noise on front passenger side when encounter bums. Was told it was sway bar end broken