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Noise from 2015 c400

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Old 03-19-2024, 01:19 PM
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2015 C400
Noise from 2015 c400

I was wondering if anyone had any ideas what this sound could possibly be. I will admit, it sounds a lot worst in the video and not that loud in person but still noticeable. While inside, I can hear and mostly annoying. No check engine light on and car runs fine. Any help would be greatly appreciated.

miles: 115,000

https://drive.google.com/file/d/1nYc...usp=drive_link

Last edited by eulin87; 03-19-2024 at 02:27 PM. Reason: Missing video
Old 03-19-2024, 04:08 PM
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2015 SL400 (M276 Turbo), 2014 C350 Sport (M276 NA), 2004 SL500 (M113), 2004 Audi TT225 (BEA)
You need to remove security restrictions from the file.

Without hearing the video, please understand that a CEL should NEVER be relied upon to think everything is all right. CELs are only for emissions-related faults. Get a proper scanner and scan your car. The LAUNCH Creader Elite 2.0 BENZ is a favorite. Currently about $190 on Amazon.


Old 03-19-2024, 04:18 PM
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Originally Posted by JettaRed
You need to remove security restrictions from the file.

Without hearing the video, please understand that a CEL should NEVER be relied upon to think everything is all right. CELs are only for emissions-related faults. Get a proper scanner and scan your car. The LAUNCH Creader Elite 2.0 BENZ is a favorite. Currently about $190 on Amazon.

Just fixed permissions. Thanks for the heads up and that scanner looks good. Im new to MB's so thank you for this. Will look into it!
Old 03-19-2024, 04:31 PM
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2015 SL400 (M276 Turbo), 2014 C350 Sport (M276 NA), 2004 SL500 (M113), 2004 Audi TT225 (BEA)
Make sure your dipstick is fully inserted into the tube. Though I haven't had it happen on my SL400, occasionally on my C350 (non-turbo, 3.5 L version of your engine) the dipstick will pop up enough to cause it to sound like the engine is coming apart. Push it in and the sound goes away.
Old 03-19-2024, 04:35 PM
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OHH. I'll look into it when I get to my car again. Thank you.
Old 03-20-2024, 11:07 AM
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2010 C300 4MATIC........ 2011 C63 AMG.............. 2015 CLS400 4MATIC.....
Technically you're in the wrong forum section
My cls400 sounds like this. There has never been anything inherently wrong with the engine, and I have xentry as well as icarsoft. There aren't any codes.

Like you said, it's annoying from the outside if the hood is up or the sound is bouncing off a wall/other car nearby. I understand it's direct injection, and the soundproofing is pretty good inside and with the hood down, but still not great.

I'll try and poke around again in xentry and see if anything pops up but I've just come to assume it's not a quiet motor.
Old 03-20-2024, 11:11 AM
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Originally Posted by Adi-Benz
Technically you're in the wrong forum section
My cls400 sounds like this. There has never been anything inherently wrong with the engine, and I have xentry as well as icarsoft. There aren't any codes.

Like you said, it's annoying from the outside if the hood is up or the sound is bouncing off a wall/other car nearby. I understand it's direct injection, and the soundproofing is pretty good inside and with the hood down, but still not great.

I'll try and poke around again in xentry and see if anything pops up but I've just come to assume it's not a quiet motor.
Oh oops. Which forum should I be in? Thanks for the heads up. lol

Well thats good to hear I guess. Might have to jsut get use to it but if you do find anything, that would be great if you could pass it along. I am planning on buying that scanner for myself for future diagnostics. Thank you!
Old 03-20-2024, 01:15 PM
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Originally Posted by eulin87
Oh oops. Which forum should I be in? Thanks for the heads up. lol

Well thats good to hear I guess. Might have to jsut get use to it but if you do find anything, that would be great if you could pass it along. I am planning on buying that scanner for myself for future diagnostics. Thank you!
If you are referring to iCarsoft, DON'T. While it is a reasonably good scanner, the LAUNCH Creader Elite 2.0 BENZ is MUCH better with more capability. They are priced about the same. I was a long-time fan of iCarsoft, but have switch to LAUNCH.
Old 03-20-2024, 01:35 PM
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Originally Posted by JettaRed
If you are referring to iCarsoft, DON'T. While it is a reasonably good scanner, the LAUNCH Creader Elite 2.0 BENZ is MUCH better with more capability. They are priced about the same. I was a long-time fan of iCarsoft, but have switch to LAUNCH.
Might be because of you (in a good way : ) the price of the scanner seems to be at 189 from 149, maybe forum members are clearing the stock on amazon?
Old 03-20-2024, 06:22 PM
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Originally Posted by W205C43PFL
Might be because of you (in a good way : ) the price of the scanner seems to be at 189 from 149, maybe forum members are clearing the stock on amazon?
Yeah, I saw the jump in price, as well. I think it happened yesterday. Might be worth waiting a day or two to see if it comes down again.
Old 03-20-2024, 06:36 PM
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PFL205.064 with M276.823 (Oil pump solenoid defeated)
Originally Posted by JettaRed
Yeah, I saw the jump in price, as well. I think it happened yesterday. Might be worth waiting a day or two to see if it comes down again.
Yup, I still think it is because forum members are buying it after reading your threads.
Old 03-20-2024, 09:14 PM
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Ha! Flash sale!


Old 03-20-2024, 09:16 PM
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PFL205.064 with M276.823 (Oil pump solenoid defeated)
Originally Posted by JettaRed
Ha! Flash sale!

Ha nice : )

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