C63 AMG (W204) 2008 - 2015

noisy fuel pump? (videos inside)

Old 06-24-2013, 10:23 AM
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noisy fuel pump? (videos inside)

all, I recently made a whining / ticking noise thread and tried updating it but could not find the edit button so apologies for creating a second thread.

so having monitored the issue further.. here's the situation. I hear a whining noise coming from the rear passenger side of the car when the fuel is < half full.. sometimes more sometimes less.

the noise is audible at idle and the frequency of the whirring / mechanical thudding varies with throttle input. at speed, the noise becomes inaudible then comes back. cold start, warm start, having driven the car doesnt make a difference. the only way the sound goes away is to fill up the tank.

so with all of this, i'm suspecting it is a fuel pump / fuel delivery related issue. is it an issue though? i don't recall hearing this before until now which is why i'd like a second opinion.

FYI the car is a 2013 sedan, LSD, non-P31 with ~ 5K miles.

at idle:

varying RPMs: (turn up volume, ear against speaker please )

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