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2011 C300 whirring sound

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Old 02-20-2024, 08:26 PM
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2011 C300 whirring sound
Has anyone ever gotten this problem where it sounds like air is coming out or like a whirring sound??
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Old 02-20-2024, 08:42 PM
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W204 2010 C300 4matic Sport M272
I watched the video over and over and cant tell what is going on.

When I start my car (M272 engine) the passenger side exhaust manifold sounds like it has a leak but then goes away as the rpms lower, 10-15 seconds maybe more. I think it has to do with the secondary air pump.
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Old 02-20-2024, 08:50 PM
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W204 2010 C300 4matic Sport M272
Does it sound like a coffee grinder? I came across an article on the secondary air pump. I cant really tell from the video and could be wrong.




Here's the article: https://eeuroparts.com/blog/secondar...hooting-guide/
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Old 02-20-2024, 10:27 PM
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Yea i’d say it sounds like a coffee grinder
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