C-Class (W204) 2008 - 2014: C180K, C200K, C230, C280, C300, C350, C200CDI, C220CDI, C320CDI

Faint bang

Old Aug 17, 2020 | 02:24 PM
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W204
Faint bang

I have a 2013 W204 1.6 7G-Tronic transmission. I've noticed that when I go to drive, I hear a faint bang when the speed exceeds 20 km / h. The sound only sounds once per drive, it doesn’t repeat until I turn engine off and restart the car and start driving. There is no problem with the transmission, the gears change well and the car was just in A-service at the brand service where it was said that everything was ok. Sometimes I hear a small squeak from the left front as I drive over the road bumbs. Is there any idea where the sound could come from?
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Old Aug 17, 2020 | 07:45 PM
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From: Newcastle Upon Tyne
W204 C220CDI 2011
Is it the doors locking ?
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Old Aug 18, 2020 | 03:47 AM
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Originally Posted by alecmascot
Is it the doors locking ?
I dont think so, doors are locked before that sound.
I tried to take a video, you can hear the thud in this video, 3 seconds before end.

https://imgur.com/BCn8XHO

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Old Aug 18, 2020 | 09:19 AM
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https://mbworld.org/forums/c-class-w...ank-sound.html

i found this old thread, basically same problem. Is this something I should worry?
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