Turbo or Engine Rattle At Low Gears?
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2018 Mercedes C43 AMG Coupe
Turbo or Engine Rattle At Low Gears?
Anyone else experience rattling or vibrations around ~3rd/4th gear when hitting the turbo at medium throttle?
I hear the rattling when my windows are down coming from the engine bay.
Doesn't seem normal. Never occurs at very low or high gears either.
I hear the rattling when my windows are down coming from the engine bay.
Doesn't seem normal. Never occurs at very low or high gears either.
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2017 C43 sedan
I think it’s the wastegate on the turbos..wastegate flutter...I sometimes hear some very lite fluttery noises too almost like leaves being blown around inside the turbos.. my Subaru sti used to do it too
Last edited by Gungaslow; May 18, 2018 at 11:41 PM.
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2003 CL 600
Using good gas? That sounds like detonation to me.
There is a bulletin about updated software for wastegate noises on certain 400/450 cars, but your 2018 has to have the newer software already.
There is a bulletin about updated software for wastegate noises on certain 400/450 cars, but your 2018 has to have the newer software already.
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2018 Mercedes C43 AMG Coupe
Last edited by jonathan358; May 16, 2020 at 10:54 PM.
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2018 Mercedes C43 AMG Coupe
Still have not taken it to a dealer just yet though I think I may have pinpoint the exact timing of the rattling, it seems to happen JUST before each upshift; particularly in Sport mode.
I don't know if it is the wastegate flutter anymore...
Any new clues as to the problem? Thanks in advance.
I don't know if it is the wastegate flutter anymore...
Any new clues as to the problem? Thanks in advance.
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2018 Mercedes C43 AMG Coupe
Sorry to revive an old thread but the service manager at my local MB dealership speculates that the noise is coming from the wastegate valve being slightly loose when almost closed. Apparently it is causing the gate to vibrate.
As the weather gets cooler, I can hear it quite audibly and it happens basically every drive. Quite annoying but the SM states that the bulletin does not recommend any fixes or replacing of parts.
I bought the car and don't want to have problems down the line so I am still concerned, not to mention the noise is a bit embarrassing...
Having something vibrate will cause it to erode eventually and the sanded-down particles would enter the turbos and into the cylinders.
On a side note, I want to thank Gunga and Joe for helping me diagnose the problem and bringing this up with service in the first place!
As the weather gets cooler, I can hear it quite audibly and it happens basically every drive. Quite annoying but the SM states that the bulletin does not recommend any fixes or replacing of parts.
I bought the car and don't want to have problems down the line so I am still concerned, not to mention the noise is a bit embarrassing...
Having something vibrate will cause it to erode eventually and the sanded-down particles would enter the turbos and into the cylinders.
On a side note, I want to thank Gunga and Joe for helping me diagnose the problem and bringing this up with service in the first place!
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C300
Same noise here
Hello Johnathan, I have a very similar problem to yours. Took my car in for service but I got "the car sounds normal to us" response. I'm taking it in to another dealer on Monday to see what they have to say.
Have you eventually got yours fixed?
Cheers,
Shrief
Have you eventually got yours fixed?
Cheers,
Shrief
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Thread Starter
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2018 Mercedes C43 AMG Coupe
No, I've taken it to 2 dealers so far. None can fix...
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2018 Mercedes C43 AMG Coupe
Is this what you are hearing? Only here it on cold starts for ten minutes at low RPMs. Sounds like a card on bike spokes. You can really hear it in the last 5 minutes of this video.
https://youtu.be/c2RRS7Y7KL0
https://youtu.be/c2RRS7Y7KL0
Your problem sounds more like a fan motor rattling, which I also have...
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From: the Right coast
'19 C43
You compared it to the sound in a video early in this thread, and hearing it I immediately thought of wastegate rattle.
Last edited by GuardianVA; Nov 22, 2019 at 03:52 PM. Reason: grammar
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2018 Mercedes C43 AMG Coupe
Is this close to the sound you're hearing?
https://youtu.be/DsKLNCRaBv4
You compared it to the sound in a video early in this thread, and hearing it I immediately thought of wastegate rattle.
https://youtu.be/DsKLNCRaBv4
You compared it to the sound in a video early in this thread, and hearing it I immediately thought of wastegate rattle.
I have yet to find a dealer who will help me fix it but with this video hopefully they can pinpoint exactly what sound to look for and what to start fixing right away. To be honest, I was just going to get a tuner shop to help me take out the engine to get to the turbos and have them extend the preload. But that will cost me $$$.
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C43 AMG Coupe (2017)
Has anyone had this resolved by their dealership? What were the steps taken? I've noticed my C43 makes a similar rattle sound to the video of that 3 series video above. It always seems worse in the summer.
I did a road test with a tech from the dealership, and he said it has to do with the turbo. Last summer they replaced the passenger side turbo but the noise remained. When i went back this past week we did a road test and when we revved the car we could the rattle sound loud and clear. He adjusted the actuator on the driver side turbo while we were pulled over during the road test and the noise stopped when we revved the car. He said it was just a temporary switch and then had to put it back.
I did a road test with a tech from the dealership, and he said it has to do with the turbo. Last summer they replaced the passenger side turbo but the noise remained. When i went back this past week we did a road test and when we revved the car we could the rattle sound loud and clear. He adjusted the actuator on the driver side turbo while we were pulled over during the road test and the noise stopped when we revved the car. He said it was just a temporary switch and then had to put it back.
Last edited by Muskokamarc; Mar 2, 2023 at 11:52 AM.
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C43 and C350 V6 petrol
Potential wastegate rattle
Has anyone had this resolved by their dealership? What were the steps taken? I've noticed my C43 makes a similar rattle sound to the video of that 3 series video above. It always seems worse in the summer.
I did a road test with a tech from the dealership, and he said it has to do with the turbo. Last summer they replaced the passenger side turbo but the noise remained. When i went back this past week we did a road test and when we revved the car we could the rattle sound loud and clear. He adjusted the actuator on the driver side turbo while we were pulled over during the road test and the noise stopped when we revved the car. He said it was just a temporary switch and then had to put it back.
I did a road test with a tech from the dealership, and he said it has to do with the turbo. Last summer they replaced the passenger side turbo but the noise remained. When i went back this past week we did a road test and when we revved the car we could the rattle sound loud and clear. He adjusted the actuator on the driver side turbo while we were pulled over during the road test and the noise stopped when we revved the car. He said it was just a temporary switch and then had to put it back.
