E-Class (W124) 1984-1995: E 260, E 300, E 320, E 420, E 500 (Includes CE, T, TD models)

central locking driving me mad.!!!

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Old Mar 1, 2009 | 02:37 PM
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downseycool's Avatar
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1989 w124 200e
central locking driving me mad.!!!

hi folks.......

my central locking has suddenly decided to have a mind of its own.... upon unlocking, if i am not quick enough getting in it locks itself.??? goes through a bout of locking and unlocking then settles down to a locked state.........all the while a strange whirring noise is eminating from the rear seat area...


please help..thanks in anticipation..


chris..
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Old Mar 2, 2009 | 05:40 PM
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crr1612's Avatar
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Mercedes benz 1991 300ce(RIP), now an 89 300ce
sounds like a vacuum leak is happening in the locking system. that sound youre hearing is the vacuum pump continuing to run even after the car unlocks.
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Old Mar 3, 2009 | 12:37 AM
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also, the vacuum pump is under your rear bench, which is why the noise is coming from back there
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Old Mar 5, 2009 | 04:17 AM
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1989 w124 200e
Originally Posted by ZedStyle
also, the vacuum pump is under your rear bench, which is why the noise is coming from back there
thanks guys, im still a bit baffled, but that does narrow it down a bit. maybe ill have the rear seat up and the door inners out..

cheers..
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Old Mar 5, 2009 | 05:12 PM
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iv seen new pumps on ebay for around £20 so shouldnt be to bad to replace
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Old Mar 8, 2009 | 07:07 PM
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S500 W220 1999
Not sure if this will help. There is thread on this website (or benzworld) regarding vacuum system for the S class and how to fault find and actually repair the pump (12 months and still running). If you can not find let me know and I can post as I have a copy on my home computer.
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Old Mar 8, 2009 | 07:15 PM
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S500 W220 1999
Found the link. May help fix you problem http://v12uberalles.com/Closing_Assist_Pump.htm
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Old Mar 9, 2009 | 01:41 PM
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1989 w124 200e
Smile

hi chaps,, many thanks for the replies and the help, i have just had an alert in my hotmail to say that id had a response so checked the forum. in a rush now but will check out the web link and report back


had my w124 200e about three years now, i really love it, did a 280 mile round trip at the w/e with no bother. it is a bit underpowered to say the least but the drive is pure benz, spesh when up to speed. i will post up a picture or two, sure you guys wouldnt mind a peek.

thanks again,

chris.
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Old Mar 11, 2009 | 03:02 AM
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I just started having this problem a few weeks ago, my mechanic fixed the problem by plugging a vacuum leak and it worked fine then a few days ago it started again so i either have a new leak or the plug came out

The best thing to do is wait for the pump to stop running which it does automatically
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Old Mar 11, 2009 | 01:14 PM
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1989 w124 200e
Originally Posted by peterstar
Found the link. May help fix you problem http://v12uberalles.com/Closing_Assist_Pump.htm
hi, checked out that link, it was very interesting but didnt really nail my particular problem, i e mailed the author of the piece and he got back to me with some useful pointers.. so thanks for the help

chris
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Old Mar 11, 2009 | 01:22 PM
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1989 w124 200e
Originally Posted by CharlestonN
I just started having this problem a few weeks ago, my mechanic fixed the problem by plugging a vacuum leak and it worked fine then a few days ago it started again so i either have a new leak or the plug came out

The best thing to do is wait for the pump to stop running which it does automatically
hmmm, maybe there is a leak then, i just cant hear it. as you say it does whirr about a bit then stops when its satisfied im locked in, or out. do you mean listen for the leak then,,

chris.
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Old Mar 11, 2009 | 05:47 PM
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My alarm decides to leave my car open at night. I'll lock it and it does lock but when i look at my car in the morning it's always unlocked and the alarm is on. It's not really a problem since nothing has ever been stolen...
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