Rattling engine noise when underload and cold

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Old 03-21-2024, 05:35 AM
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B220d 2020
Rattling engine noise when underload and cold

Hi guys. Maybe someone can help as my local MB garage couldn't. I own a b220d 2020 16k miles and the car makes a rattling noise when cold and rpm goes over 2k. As soon as the temp goes up and the engine is warm rattling stops. Any ideas? Thank you in advanceRattling noise happens its hard on passenger side only when car is cold and underload. When shifting happens over 2k rpm. As soon as the engine warms up it disappears. I tried to rev the engine when cold but parked and there is no rattling.

https://youtube.com/shorts/2HR5VTTYOGk?si=m6V4yxGx5A8VjWSR

Last edited by Seco; 03-21-2024 at 08:19 AM. Reason: Adding more details and a video link
Old 03-26-2024, 10:47 AM
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2010 ML550 VIN WDC1641722A564750, 2010 B180
What did MB suggest to you? Could they replicate the noise?

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