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What is this high pitched beep noise coming from my engine?

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Old 08-23-2022, 11:14 PM
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2010 e550 coupe
What is this high pitched beep noise coming from my engine?
I recently noticed this high pitched beep sort of noise that runs continuously until I shut the car Off. It sounds almost electronic but I think it is more likely a vacuum hose or some air intake area with a leak. I have no idea where to start looking though as I can’t pinpoint it other than it coming from the engine .

https://www.veed.io/view/fd718f23-b156-4508-9fce-abda3e6cd93f
Last edited by Dnasty; 08-23-2022 at 11:23 PM.
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