D-Ramey

I bought my car about 2 months ago its been good to me so far but i hear a strange noise in the rear

So i took it to mercedes where a friend works we put the car in dyno mode and the only sound i could hear was coming from the drive shaft about 8-12 inches from the rear end ?.

When driving you can really hear it from 55-75mph and when you engauge the gas pedal it goes away it seems like ! it sounds like a freestyle sound on a bmx bike its hard to explain !!!! has anyone else had the same issues ?.

does the shaft have a carrier bearing or something that could be causing this noise ?.

MB Marko

C63 forum respones in this section.

D-Ramey

i have for weeks nothing enlighten me please

omar_8391

I'm also curious about the OPs question. Have been searching but no match.

I have a similar noise coming from the rear end of the car. It is rotational, and increases/decreases with speed. My initial impression is that it is having to do with the rear differential or driveshaft linkage.

Funkwagen

Tire/wheel balance first. It can be incredibly noisy in w204s

omar_8391

The noise I am experiencing is more mechanical than what you would expect from tires contacting the road, or from improper balancing.

It sounds like metal on metal, cyclical/rotational and is affected by speed.

Carsy

I would do a close inspection of your universal joints.

Push & pull them around with a little bar to find possible slack.

There was a post not so long ago on a universal joint letting go with expensive consequences to gearbox housing.

menappi

OP - did you ever figure this problem out? I think I am experiencing something similar and can't tell what it is.

JustLooking

OP is likely gone, but for others....

If the sound is centered in the car, and is a pitched in relation to speed howling, then it could be center bearing. Should be an hour job or so, part is cheap. I've had 3 W204's and one had this problem. Took a month for MB to find culprit, despite me telling them that it was a 'bearing noise coming from the center", but they did find and remedy. I have audio files of the noise, and can send to someone if requested, although I don't log in or post often. Sounds like WoooooOOOoooooOOOoo

menappi

My noise does sound like it's coming from directly under the center console area. It is speed dependent but when I throw the car into neautral (while driving down the road) the noise is still there. 35 mph+ and it's almost impossible to hear. Not sure if any of that info is relevant.

Could you send me the sound/video that you have? PM me a link if possible

oogurkan

Hello, same thing with my w212. What was the solution?

W204Motorsports

It's either your driveshaft center bearing or a cracked flex joint (rear or front). Any competent mechanic can diagnose it with a simple visual inspection to pinpoint which one failed.

hakho

Hello, OP, I have this exact problem and it is driving me crazy. What was the issue? Please let me know. Thanks

Josh Finan

I've been told that the driveshafts in these cars are Non-Serviceable. but there is a company that makes a serviceable driveshaft (u-joints can be replaced, etc).