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Intermittent pulsing or pump noise.

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Old 04-07-2021, 08:13 PM
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2017 c300
Intermittent pulsing or pump noise.
I have a noise that I hear intermittently, almost sounds like a small air pump for a few seconds. I thought it might be the purge valve, but I’m not sure. I have attached vide, sorry for the quality, but you can hear it at the end of the video. Thank you
Last edited by Brandon Simpson; 04-07-2021 at 08:14 PM. Reason: Video
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Old 04-09-2021, 11:21 AM
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W205, X253, C190, W213,
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Old 04-09-2021, 11:45 AM
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2017 c300
Shorter version with pulsing noise
You can barely hear it in background. Thank. You
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