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Rattling noise from engine when releasing gas pedal

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Old May 12, 2015 | 12:52 AM
  #1  
HiZh's Avatar
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2015 C300
Rattling noise from engine when releasing gas pedal

My 2015 C300 only has 2800 miles on it.

The rattling noise can be heard when releasing gas pedal at every cold start.
The noise is loud like driving a truck.

And my C300 is vibrating when it is sitting still in the Drive gear . It is really making me feel uncomfortable.

The MB technician told me these are normal on 2015 C300, but I don't think so.

Have you ever had these issues on your C300?

Last edited by HiZh; May 12, 2015 at 02:48 AM.
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Old May 12, 2015 | 01:39 AM
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PeteInGilroy's Avatar
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From: Columbus, GA
'25 MB GLE 450, w/airmatic
Originally Posted by HiZh
My 2015 C300 only has 2800 miles on it.

The rattling noise can be heard when releasing gas pedal at every cold start.
The noise is loud like driving a truck.

And my C300 is shaking when idling in gear. it is really making me feel uncomfortable.

The MB technician told me these are normal on 2015 C300, but I don't think so.

Have you ever had these issues on your C300?
Yes, I have a clicking noise when off the accelerator when cold but I wouldn't compare it to a truck. I don't get any shaking but do get a diesel like sound.
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Old May 12, 2015 | 02:29 AM
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From: Manchester, UK
BMW e89 Z4 sDrive 35i & MB S205 C200 AMG Premium Plus
I don't get any noise other than the normal DI noise. I do have an engine misfire every half hour or so of driving, it feels like that anyhow, I'm not sure what it is but I feel a slight judder now and then on the motorway at speed. Feels like one cylinder didn't fire. Just keeping an eye on it. Could be poor fuel or an injector.
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Old May 14, 2015 | 01:47 AM
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2015 c300 4matic
I have similar sound... In fact there are a few thread discussing this sound. While dealer would say this is normal, I don't really agree... Thinking about filing a complain with BBB or something.


https://mbworld.org/forums/c-class-w...e-startup.html
https://mbworld.org/forums/c-class-w...ml#post6400224
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