What's the sound from the engine compartment when you open the door

Nov 29, 2002 | 10:48 PM

xekx

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What's the sound from the engine compartment when you open the door

I noticed a humming type sound from the engine compartment whenever I remotely unlock the doors or open a door. Anyone know what this sound is?

Nov 29, 2002 | 11:04 PM

saintvir

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Joined: Nov 2002

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From: Fort Myers, FL

'23 EQE 350 4MATIC

Re: What's the sound from the engine compartment when you open the door

Quote:

Originally posted by xekx
I noticed a humming type sound from the engine compartment whenever I remotely unlock the doors or open a door. Anyone know what this sound is?

It is the SBC pump getting ready to work for you.

Nov 30, 2002 | 09:56 PM

ashahashah

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Joined: Oct 2002

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From: New Jersey

2003 E320 Obs Black/Ash

Re: Re: What's the sound from the engine compartment when you open the door

Quote:

Originally posted by saintvir
It is the SBC pump getting ready to work for you.

That's right - and if you pay attention while driving you will also hear it and feel it via the brake pedal once in a while - which I do not like. Anyone else feel/hear it while driving?

Nov 30, 2002 | 10:28 PM

Juke-box

Super Member

Joined: Mar 2002

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From: Toronto

SLK 350 '05

i hear and feel it, but it doesn't bother me much..

and the height of my car always seem to be different each time i park...why is that?

Dec 1, 2002 | 03:11 AM

bmms8

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Joined: Jul 2002

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From: SoCal

juke, this also happens to us, i think it happens because when you sit in it, the car lowers a little bit

Dec 2, 2002 | 01:07 PM

ValueplusClass

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I think its dependant on brake usage while driving.

Dec 3, 2002 | 06:12 PM

Barney

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Joined: Aug 2002

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From: Seattle

2001 ML320

I too have noticed that humming rumbling noise from time to time while driving and almost always when first getting into the car in the morning. It is a bit annoying.

I also notice that when driving in my office garage, up some ramps going very slowly that the car seems to hesitate a bit. It seems like the tach shows the engine slowing down around 500 and then it revs up making a strange sound like recovering from a stall. I only notice this when going very slowly - perhaps it is gear searching?