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Old 07-31-1999, 05:02 PM
Registered User
Join Date: Apr 1999
Location: Cincinnati, OH, USA
Posts: 59
Hello Everyone,
In past threads I read that when the driver's door will not close automatically I can pull fuse number 9 in the trunk and push it back in. This has reset the system but it seems to happen more frequently now. Does anyone know a complete fix for this?

Thank You

92 500SEL
Old 08-01-1999, 10:29 PM
Registered User
Join Date: Mar 1999
Location: Suwanee, GA, USA
Posts: 4,712
You have to replace the pump. It is located behind the rear panel of the trunk. It is in the top left corner as if you are looking at the back seat from the rear of the car. We do sell these in the partshop.


Old 08-01-1999, 10:56 PM
Registered User
Join Date: Apr 1999
Location: Cincinnati, OH, USA
Posts: 59
Thanks for the reply. I just thought it was strange that the failure only occurs on the driver's door whereas on all the other doors the system works. Is it still the pump if it only affects one door? How much is the pump?

Fred Berry
92 500SEL
Old 08-02-1999, 12:53 PM
Senior Member
Join Date: Apr 1999
Location: Walnut,CA,USA
Posts: 554
It has different circuit and relay for each door in case if one door is not working all other three still function(it's part of the pump) the Closing Assist pump is not cheap
check with online passhop for price.

MB STARS Master Guild Technician,12 years MB tech
5 years independent shop owner

[This message has been edited by MB STARS (edited 08-02-1999).]
Old 08-04-1999, 10:55 PM
Registered User
Join Date: May 1999
Location: Charlotte, NC, USA
Posts: 688
The pump assembly from MBNA (oops...MBUSA) is
around $700 and has a one year warranty. My 92 300SE needed one and I got a rebuilt unit also with a one year warranty from a place
called Europarts Unlimited in NC. Their phone
number is 704-847-4130. Mine works like a
new car if I just could find a way to keep the dash warning lights from blinking like Christmas eve all the time the
car will be rid of bugs...for now!

'92 300SE
'88 300CE
'84 190/5.0
Old 08-04-1999, 11:12 PM
Bill Wood's Avatar
Retired Webmaster
Join Date: Mar 1999
Location: Johns Creek, GA, USA
Posts: 5,013
We should have new and rebuilt pumps in stock at PartsShop. Fill out a Parts Information Request and will let you know what your choices are.

Tobias is correct that MB list is around $700. We will certainly be lower than that...especially with a rebuilt unit.

Bill Wood - Webmaster, LLC

Old 08-04-1999, 11:22 PM
Registered User
Join Date: May 1999
Location: Charlotte, NC, USA
Posts: 688
Sorry I forgot to tell you the cost for the rebuilt unit. It was $349. Hope this helps.

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