Pesky problem w/power door closers on '96 S420
Thread Starter
Junior Member
Joined: Feb 2003
Posts: 73
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From: Grants Pass, OR
1996 S 420
Pesky problem w/power door closers on '96 S420
Every few days or so, my power door assist system quits working. It will work again after I pull/re-insert trunk fuse #9 for another day or so, then quits again. Any clues on this? THANKS.
Member
Joined: Jan 2005
Posts: 81
Likes: 1
From: Toronto Canada
97 S500, 04 ML350
they say its a sign that the power assist pump is going.
pulling the fuse just resets the pump, but wont last long. my 94 S420 use to do the same thing, i think the pump is $600 - $800.
good luck
pulling the fuse just resets the pump, but wont last long. my 94 S420 use to do the same thing, i think the pump is $600 - $800.
good luck
Thread Starter
Junior Member
Joined: Feb 2003
Posts: 73
Likes: 0
From: Grants Pass, OR
1996 S 420
When it stopped working again today, I noticed that only the driver's door quit working. All the rest still worked. I reset the pump as before and the driver's door worked again. Wierd.
Is this an electrical problem with the pump brain?
Is this an electrical problem with the pump brain?
Super Member
Joined: Mar 2004
Posts: 640
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From: Granbury Texas(burbs of DFW)
a Few Nice cars.
Sura...Congrats on the Door Assist pump problem..YOU are TRUELY enjoying your w140 now!!!..all kidding aside this is ONE of the most problematic things that happen to the W140..you can buy a new pump but it will go out again..MAIN Problem with these pumps is the Doors on the W140 are VERY Heavy and needs ALOT of pressure to close them with the pump,thus straining the PUMP and killing it DOA...good luck man!
Junior Member
Joined: Sep 2005
Posts: 63
Likes: 1
From: Chicago, IL
1995 S600 Sedan
Originally Posted by sura
When it stopped working again today, I noticed that only the driver's door quit working. All the rest still worked. I reset the pump as before and the driver's door worked again. Wierd.
Is this an electrical problem with the pump brain?
Is this an electrical problem with the pump brain?
http://v12uberalles.com/Closing_Assist_Pump.htm
...before you buy anything.
Member
Joined: Apr 2004
Posts: 105
Likes: 0
1997 S600 Sedan
sura, your pump is fine. You just need to adjust its shut-off pressure.
At least, that's my armchair diagnosis without being able to touch your car. There is possibly a very small leak in your driver's door line somewhere, but most likely, all you will have to do is adjust the shut-off pressure, and you will have many years more of trouble free operation.
Read my article at pcmaher's v12uberalles web site.
Brett
Read my article at pcmaher's v12uberalles web site.
Brett
Last edited by brett san diego; Sep 26, 2005 at 01:46 PM.
Thread Starter
Junior Member
Joined: Feb 2003
Posts: 73
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From: Grants Pass, OR
1996 S 420
Thanks so much to those who responded and especially to Brett S.D. for the excellent write-up. I did the pressure adjustment - took about 15 minutes! If its still working in a couple of days, we'll call it a success.
Ray
Ray
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Thread Starter
Junior Member
Joined: Feb 2003
Posts: 73
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From: Grants Pass, OR
1996 S 420
UPDATE: Pesky problem w/power door closers on '96 S420
It's been several days now and the system is still working. I'd say the pump adjustment is the definitive solution to this pesky problem. Thanks all.
Ray
Ray
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Member
Joined: Mar 2002
Posts: 165
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From: Imperial Beach CA
1995 S320 and 1995 S500
help
I have a similar problem, and I live in San Diego. I have a 1995 S320. It is not intemittenly not starting as well as the locks/vacuum problem. It started at the same time.
I am at gaidif@yahoo.com HELP!!!!
Lets talk
Gman
I am at gaidif@yahoo.com HELP!!!!
Lets talk
Gman
