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W205 C300 Turbo whining?

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Old 04-08-2019, 08:41 PM
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C300 4matic
W205 C300 Turbo whining?
Hey everyone...

So i recently noticed a noise from my turbo when accelerating.
It almost sounds like a supercharger whine and i cannot seem to figure it out.
I checked for boost leaks with no luck and the car only has 31k miles so it shouldn't have a failing turbo this early...
Any idea?! PLEASE HELP
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Old 04-08-2019, 08:43 PM
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C300 4matic
Car does not pull as fast as it did and the mpg is complete *** now..
PLEASE HELP!!!
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Old 04-09-2019, 12:42 PM
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did you check your air filter / filter box?
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Old 04-09-2019, 05:38 PM
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‘15 C300 4M Sport, ‘20 GLC300
Hopefully its just a boost leak or as John said maybe the air box isn't completely sealed. Are you using any kinda piggyback? Keep us posted.
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Old 04-09-2019, 06:24 PM
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C300 4matic
Checked air box and everything that I can reach with the current tools I have and had no luck.. I’ll keep it updated. I’ll be taking my car in later this week for a full diagnostic
No tunes or piggybacks being used.
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Old 07-22-2019, 12:52 PM
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What did it turn out to be? Do you have a video of the whine?
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Old 07-22-2019, 10:49 PM
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I’ll record a video tomorrow when I get the time!
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Old 07-22-2019, 11:26 PM
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2002 E55 AMG, 2015 Mercedes C300 4Matic
Originally Posted by C300AWD
Checked air box and everything that I can reach with the current tools I have and had no luck.. I’ll keep it updated. I’ll be taking my car in later this week for a full diagnostic
No tunes or piggybacks being used.
no more AMR tune?
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