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  #1  
Old 10-20-2006, 10:14 AM
oldsouth's Avatar
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Central Locking Pump Parts

On my 1995 S350 (W140), the central locking pump under the rear seat is out. It is the motor that is bad. Does anyone know where I can purchase the motor alone. The numbers on the motor are as follows:
13V 9411
1 397 220 145
1137222815
7 3.95

I contacted Bosch and they said they are Mercedes propriatary parts. Mercedes only sells the whole unit. Anybody been through this?

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1995 S-350
370K + SOLD
1952 220B Cabriolet
39K kilometers + SOLD
1998 E300D
310K +
2012 E350 BlueTec
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  #2  
Old 10-20-2006, 01:00 PM
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MB part

Sold as a unit only...

http://www.detali.ru/cat/oem_mb2.asp?TP=1&F=140134&M=603%2E971&GA=722%2E367&CT=F&cat=19B&SID=80&SGR=035&SGN=02


PART NUMBER SEARCH RESULTS WITH PRICES
Vehicle 1995 Mercedes Benz S 350 D
Part: Vacuum Supply Pump
Note: for Central Lock System
For central locking. Located beneath rear seat. Up to chassis number A-216190, requires (2) 210 800 02 22 vacuum coupling, (2) 210 800 04 22 vacuum coupling, (1) 000 987 11 45 plug and (1) 007 997 61 82 vacuum hose. For vehicles with electric headrests, (2) 124 805 02 44 vacuum plug is required. For vehicles without reversing aid, (1) 210 800 00 53 cap is required.

O4000-58420 Vacuum Supply Pump Bosch IN STOCK $561.88

http://catalog.eautopartscatalog.com/mercedesshop/sophio/quote.jsp?clientid=catalog.mercedesshop&cookieid=1WW02D0M91XB0RQYJA&baseurl=http://catalog.peachparts.com/&partner=mercedesshop&year=1995&product=O4000-110930&application=000322999




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  #3  
Old 10-20-2006, 01:15 PM
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This is an item that shows up on eBay a lot. You could get one from a wrecking yard, sometimes for a song, depending on the seller of course. I've had good luck with used ones.
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  #4  
Old 10-20-2006, 02:28 PM
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What doesn't work when that pump is shot? I thought the ACC actuators were fed (as it were) by the central locking pump. In my 93 SD I don't see a line from the engine pump to the cabin. My closing assist pump is out of the car and the ACC works.

Sixto
93 300SD
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  #5  
Old 10-20-2006, 02:47 PM
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The central locking and the trunk handle doesn's work. The electric motor is all that is wrong with mine. I found a new whole unit for $322 and I found a place in California that rebuilds them for $400. So I guess I will go for the new unit. The guy that rebuilds them would not sell me just the motor. He said it took him 6 months to find out the supplier. Big markup in this item. You should be able to buy just the motor for under $100. After I replace my unit, I am going to take the motor out of the old one and see if a local alternator shop can fix mine. Probably just need new brushes.
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1995 S-350
370K + SOLD
1952 220B Cabriolet
39K kilometers + SOLD
1998 E300D
310K +
2012 E350 BlueTec
120K
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  #6  
Old 10-20-2006, 03:49 PM
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There are no parts available, there are some rebuilts out there search the advertisers. I would not buy one on EBAY unless you know lots of "it worked when it left here"
As to "sixto" the closing pump just does that, draws in the doors and trunk lid.
The locking pump does lock/unlock, back up rods, vacuum headrest release, trunk handle that in addition to providing pressure for the lumbars, and HVAC vacuum "backup" when the engine does not provide it.
Many of the rebuilts come from "Programania" or something like that, they also buy cores from mechanics.
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  #7  
Old 10-21-2006, 03:27 AM
sixto's Avatar
smoke gets in your eyes
 
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Sorry to go on a tangent but the closing assist pump motor (different numbers than the central locking pump motor) has a brown wire and a black wire. The brown wire goes to a PCB hole marked MP1, the black wire goes to a PCB hole marked MP2. The Which is (+) and which is (-)?

Thanks,
Sixto
93 300SD
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  #8  
Old 04-17-2015, 03:01 PM
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I started looking for a motor for the vacuum pump and when you take the square plate off of the motor you will see that it is made by JOHNSON.I looked them up and found a motor 9 to 18v,that has a longer shaft. cut the shaft to size, and you are in business. You must make a flat side in the shaft like your old one.The part comes from CHINA it costs less than $10, parts and shipping.
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  #9  
Old 04-17-2015, 08:56 PM
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Perfect time for pik a part or as mentioned, ebay.

Local yard is showing vacuum pumps at $20
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  #10  
Old 04-19-2015, 09:42 PM
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These same style motors are used in a host of small appliances including hand held battery vacuum cleaners (dust busters) and slot cars.
The trick is to get a motor that spins at the same RPM as the original.

The motors burn out usually because of a vacuum leak somewhere in the door or HVAC controls. If there is no leak the system becomes vacuum "charged" and the motor stops operating. If there is a continuous soak of vacuum the motor operates continuously. There is a detector in the pump that shuts off the electric motor when enough vacuum is "stored" in the system.

Wheh replacing a faulty pump or repairing the motor makes sure you get a vacuum tester and find where the leak in the system is. - usually the HVAC flap rubbers gone bad, perished or broken.
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  #11  
Old 04-20-2015, 11:02 AM
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Here is how to fix them...

DIY: PSE Pump Post Mortem and Resurrection: FREE Repair! - Mercedes-Benz Forum

If it is too much for you, I fix them too.-post 96

::W140 Classifieds FS & WTB thread:: - Page 3 - Mercedes-Benz Forum

Martin

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