downseycool

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..

crr1612

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.

ZedStyle

also, the vacuum pump is under your rear bench, which is why the noise is coming from back there

downseycool

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..

viperuk1

iv seen new pumps on ebay for around £20 so shouldnt be to bad to replace

peterstar

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.

peterstar

Found the link. May help fix you problem http://v12uberalles.com/Closing_Assist_Pump.htm

downseycool

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.

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

downseycool

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

downseycool

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.

YNVDIZW124

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...