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Noise when turning off ignition

     
Old Apr 7, 2013 | 10:23 AM
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DDoone
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C250 coupe
Noise when turning off ignition
My '13 C250 coupe makes a single short buzz or groan when I turn off the ignition after a drive. It seems to come from the drivers side rear of the car. I think it might be a pressure relief valve in the fuel loop at the fuel pump, the dealer service dept hears it but has no idea what it could be since everything works ok. Anyone else have this experience? My unit is a November 2012 build. Thanks.
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Old Apr 7, 2013 | 02:00 PM
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Jubair Ahmed's Avatar
Jubair Ahmed
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2013 C350 Coupe 4M
I notice it sometimes on my C350 and I thought it was just the HDD in the COMAND system powering down (the buzz sound).
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Old Apr 7, 2013 | 08:09 PM
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DDoone
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C250 coupe
No hdd in my unit.
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Old Apr 7, 2013 | 11:27 PM
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Ikester
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From: Livingston, NJ
2011 C300 W204 (Pending)
My '11 C300 does the same thing, but its subtle.

And my father's 07 E350 did the same
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Old Apr 8, 2013 | 04:07 AM
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dol4er
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C204
Mine also has it.
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