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rear rattle noise

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Old 09-09-2016, 05:38 PM
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2012 C350 Edition 1
rear rattle noise

Has anyone experienced rattle from the back when going over small bumps and cracks on the road?
I don't hear it with the windows closed only when open and definitely in the back. Sounds like a loose part rattling.
I first thought it was those plastic covers over the back suspension linkage which feel loose but made no difference after tightening with zip ties
Thank you.

Last edited by kavadarci; 09-11-2016 at 12:49 PM.
Old 09-09-2016, 08:42 PM
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c300
Dumb thought but could it be the license plate frame? Some are cheap plastic and rattle.
Old 09-09-2016, 11:32 PM
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2017 C43 AMG, 2010 C350 4Matic, 9 Motorcycles
If you manually shaky the back of the car can you replicate the noise?
Old 09-10-2016, 08:37 AM
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2012 C350 Edition 1
Not the plate for sure.
Will lift the car today and do some investigation.
Old 09-10-2016, 02:54 PM
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2012 C350 Edition 1
Ok, went under the car while changing the differential oil. All I manage to find out is when I hit the tire with a rubber mallet I hear rattle inside the wheel, like inside the e brake drum area. The rest looks good.

At the same time I sprayed the cv joint rubber boots as they were bone dry.
Old 09-10-2016, 05:13 PM
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YOUR problem is coming from your emergency brake cable going in to the rear wheels.
there are plastic button that goes on each side that eliminate any rattle wile going over bumps.
had the same issue made the dealer repair it .
had prove it to them by putting it up on the lift and making them use a rubber malit on the rear tires.
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Old 09-10-2016, 05:17 PM
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2012 C350 Edition 1
I would agree with you.
Do you know what part was replaced?
Part number or what is it called?

Thank you.
Old 09-11-2016, 12:48 PM
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2012 C350 Edition 1
More info.
Few people have had this problem and dealerships are having hard time discovering the root cause.
The reason is loose clips for the e brakes.
Part number is 230-988-00-81 o number 407 in in attached diagram.
I hope this helps people with similar problem.
Thank you.
Attached Thumbnails rear rattle noise-470-pic.gif.png  
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Old 09-11-2016, 11:55 PM
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Nice when people put their solutions and info up instead of just being a grab n go. Thank you, although I personally didn't need it, lol!
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Old 05-11-2020, 03:04 PM
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2012 Mercedes-Benz C-Class C 300 Sport 4MATIC
Hey current and past C300 owners, I have the same rattle. Is this something most mechanics can find or fix, something I can do on my own, or something I should bring to the dealership to be fixed?

I have the exact same rattle, rear right tire. Super annoying.
Old 10-05-2020, 08:59 AM
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Did you mean to type '.... o number 470 referring to the attached diagram' ?



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