iactac

W213 rear knocking sound

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My one month old w213 (e250) has a knocking noise when going over humps.  The noise seems similar to a bad absorber but considering it's new, I brushed it aside until I sent to c&c two weeks ago and the preliminary assessment confirmed my suspicion.  I managed to get a replacement car (same model) while the car is in workshop and to my surprise, the same noise could be heard too, so wondering if it's some manufacturing defects or what.  Does anyone has the same experience?  

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Lol... Encounter something similar when CnC procided a CLA SB courtesy car for my B class. The courtesy car has the same exact issue as the one essential I reported for my B class. 

 

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Could it be the door seal noise?

Some members mention putting some lubricant at the rubber seal may help. 

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Collected my car today and c&c said it's the shock absorber mounting and replaced them....Will monitor and see if the noise comes back.

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