slight rumbling noise | Technical matters | Back Room Forum

Mon 2 Dec 2002 22:40

slight rumbling noise - steve

I have a very slight rumbling noise on my mercedes e320 coupe 1995. It is very slight - best heard on tickover and with the interior fan switched off. It can be heard best with your head by the transmission tunnel in the passenger footwell - it does not vary with engine speed and goes away when the engine is off. It does not happen with the engine off and the ignition on so it is engine/transmission related. It is so slight that it can not be heard when the fan is turned on. I am just wondering what it could be and is it going to get worse?

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Thu 12 Dec 2002 00:15

slight rumbling noise - kithmo

Is it a fuel injected petrol engine ? If so it could be the electric fuel pump running pressurising the system. It should stop after a short while if the engine is not running but may continue running when the engine is running.

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