Mercedes :: Clunking Noise While Going Over Bumps


Feb 18, 2016

I am losing my mind over this. I bought a 2013 c63 in May and the last few months it has been making this clunking noise. I have taken it to the dealership 3 times so far and each time the noise goes away for about a week only to return worse than it was. It used to only make noises when I turned right on incline changes at low speeds. Now it makes the noise going over any bump at any speed.

The first time I took it in they replaced the front left strut. The second time they replaced the front right strut. The third time they replaced the lower control arm.

I am posting 2 videos of the noise. This video is between the first and second visits and the noise can be heard around the 24 second mark.

[URL] ....

This second video was taken today, 2 weeks after my third visit. You can hear the noise continuously throughout the video on any slight bump.

[URL] ....

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Have a 2011 SE with just over 21k miles on it.

Problem #1: When ever I go over bumps, go down my drive way, I hear this rather loud noise coming from either the roof or right rear. It sounds like someone is hitting metal with a hammer.

It happens when I'm turning the wheel or just driving straight.

Problem #2: Also when I am going over a speed bump, when the rear of the car goes over it, the suspension gets squeaky. Speeds are about 2-3 mph~

Unfortunately, it is no longer under factory warranty so taking it to the dealer is my last option.

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The clunk happens over bumps, with or without the brakes on and is loud enough that if the radio is on, it can still be heard.

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I brought it to one mechanic and they said the rack and pinion needs replacing which is an expensive fix. I couldn't believe that was the problem as I had no leaks and it was on their solid. I ended up taking it to my uncles mechanic and he stated its the stabilizer links on the front right and front left wheels. My way to work has a lot of bad pot holes... so I'm hoping that the stabilizers are actually the problem.

Anyways, tomorrow I will be bringing it to the mechanic to have them both changed. I know a lot have been complaining about this issue and instead of replacing the rack and pinion, I thought I'd try and see if it actually is the stabilizer links and provide a fix for some of the sonata owners on here.

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[URL] .....

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Most noticeable at the end of the video...it sounds exactly like a bad sway bar bushing but that's not it...

Front end clunk - YouTube ....

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