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Old 07-14-2023, 04:48 PM
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2019 c43
C43 Engine Weird Sound
My 2019 c43 engine sometimes makes strange noises, Does anyone know what the potential problem might be?

Here is a video
https://drive.google.com/file/d/1VYr...ew?usp=sharing

Thank you!
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Old 07-14-2023, 05:43 PM
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With engine noise it's better if you record it with the hood open, and try to locate where it's coming from. Not sure which noise you are referring to. Is it the intermittent kinda like a faint fart noise? Not sure what that is.
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Old 07-14-2023, 05:53 PM
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Originally Posted by superswiss
With engine noise it's better if you record it with the hood open, and try to locate where it's coming from. Not sure which noise you are referring to. Is it the intermittent kinda like a faint fart noise? Not sure what that is.
OkI recorded a new one，https://drive.google.com/file/d/1lcc...w?usp=drivesdk
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Old 07-14-2023, 05:58 PM
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Much better, but yeah sorry no idea what that could be. Never heard that before. Strange rhythm to it.
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Old 07-14-2023, 06:04 PM
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Originally Posted by superswiss
Much better, but yeah sorry no idea what that could be. Never heard that before. Strange rhythm to it.
All good！Thank you for trying to help me！
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Old 07-14-2023, 09:16 PM
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Both my ‘19&’20 made this noise. I got some saying it was the wastegate solenoid?
Last edited by MaverickC43; 07-14-2023 at 09:16 PM. Reason: Wrong word
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Old 07-14-2023, 09:54 PM
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Originally Posted by MaverickC43
Both my ‘19&’20 made this noise. I got some saying it was the wastegate solenoid?
Are you going to fix it, or just leave it there?
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Old 07-14-2023, 10:26 PM
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I haven’t gotten a dealer to say there was a problem.
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Old 07-15-2023, 01:31 AM
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2018 Mercedes C43 AMG Coupe
Sounds like a loose vacuum line...
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Old 07-15-2023, 02:43 PM
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Originally Posted by EdwardZeng
My old Audi A8 4.2L made a very similar noise. It was the PCV valve and they were a terrible design, failed regularly (and made that noise), and were quite expensive from Audi.

I've no idea what the PCV setup on the M276 is like, so I'm not much help with finding the part.
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Old 07-18-2023, 11:52 AM
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c43 AMG
Hi, i‘m from Germany. My english is not so good,sorry for that. The fault is the boost pressure control valve. The part number should be A0081535428. On my car it was the same noise.
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Old 07-18-2023, 09:09 PM
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Ur English came through perfect!!
thank you!!!
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Old 07-18-2023, 09:23 PM
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2019 c43
[QUOTE=timonpumba;8816844]嗨，我来自德国。我的英语不太好，对此感到抱歉。故障是增压压力控制阀。零件号应为 A0081535428。在我的车上也有同样的噪音。[/QUOTE
] You are a lifesaver, thank you!!
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Old 08-07-2023, 07:38 PM
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Originally Posted by EdwardZeng
My 2019 c43 engine sometimes makes strange noises, Does anyone know what the potential problem might be?

Here is a video
https://drive.google.com/file/d/1VYr...ew?usp=sharing

Thank you!
Someone offered a solution already but yes very common issue thankfully the fix is cheap and easy, was also discussed in this thread https://mbworld.org/forums/c450-c43-...nge-sound.html
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Old 06-23-2024, 08:37 AM
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2019 W205 C43 AMG Coupe
2019 W205 AMG C43 Coupe
Originally Posted by jonathan358
Sounds like a loose vacuum line...
Funnily enough, I’m experiencing this for the very first time and posted it in a few MB Group, so great to understand what the issue is.

Does anyone know what the downsides of not getting it fixed right away, please?

Anyone had any quotes on fixing it?
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