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#1
01-07-2007, 11:15 PM
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1997 E420 (M119) power steering pump leak
I am having a leak coming from somewhere behind the power steering pump. Any clues or advice? I researched the website and do not know if there is a way to remove the reservoir to the pump to see what is going on....
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2008 S550 2010 GLK350 1997 E420 (retired) 2005 CLK500 (retired) 
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#2
01-08-2007, 08:18 AM
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The reservoir is removable..but no spart parts available for that pump..
Must be replaced as an assembly.
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MERCEDES Benz Master Guild Technician (6 TIMES) ASE Master Technician Mercedes Benz Star Technician (2 times) 44 years foreign automotive repair 27 Years M.B. Shop foreman (dealer) MB technical information Specialist (15 years) 190E 2.3 16V ITS SCCA race car (sold) 1986 190E 2.3 16V 2.5 (sold) Retired Moderator
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#3
01-08-2007, 08:23 AM
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Would you mind telling me how to remove the reservoir? I would like to clean things up and try to pinpoint the leak source....
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2008 S550 2010 GLK350 1997 E420 (retired) 2005 CLK500 (retired)
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#4
01-11-2007, 11:08 PM
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Is it common for these pumps (used on 1997 E420, 1996-97 S420, S500) to develop a leak such that you have to replace the whole assembly? Or is a leak usually caused by an o-ring. I see that there is an o-ring to the reservoir sold in the parts shop.
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2008 S550 2010 GLK350 1997 E420 (retired) 2005 CLK500 (retired)
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#5
01-13-2007, 12:40 PM
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I know the dealer here swaps out the internals of the pumps and that seems to work quite well. Also, you'll need to replace the hose to the reservoir.
Jonathan
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Blue Ridge Mercedes Jonathan Hodgman http://www.blueridgemb.com/ Enthusiast Service, Restoration & Tuning. Follow Us on Facebook! Located in the Atlanta area Specializing in all pre and post merger AMG's including Hammers and DOHC M117 engines. Mercedes Repair Atlanta
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#7
01-24-2007, 09:28 AM
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its easy to rebuild the pump, buy the repair kit either original part or OEM, won't matter, but you have to be knowledgeable in order to be able to replace the new parts the right way otherwise, you get a bad result, the leak on the top neck portion is due to the o ring (which may be the culprit) .
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#8
01-24-2007, 10:37 AM
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The short hose under the reservoir is a common leak point. rule that out first.
__________________
 1980 500SE/AMG Euro 1981 500SEL Euro 1982 380SEL 1983 300TD 1983 500SEC/AMG Euro 1984 500SEC 1984 300TD Euro 1986 190E 2.3-16 1986 190E 2.3 1987 300D 1997 C36 AMG 2003 C320T 4matic past: 1969 280SE 4.5 | 1978 240D | 1978 300D | 1981 300SD | 1981 300SD | 1982 300CD | 1983 300CD | 1983 300SD | 1983 380SEC | 1984 300D | 1984 300D | 1984 300TD | 1984 500SEL | 1984 300SD | 1985 300D | 1986 300E | 1986 560SEL | 1986 560SEL/Carat | 1987 560SEC | 1991 300D 2.5 | 2006 R350
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#9
01-24-2007, 11:22 AM
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it is most likely the infamous hose. the pump itself is not too bad to rebuilt, but the hose is easier to change out.
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93 Toyota Corolla 177K 95 S 500 coupe 82K 92 400E 180K (SOLD) 94 E 420 150, blown gaskets (SOLD) http://www.kanio.net/mercedes_signature.jpg
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#10
01-24-2007, 03:12 PM
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P/S leak
The resivoir has two 10mm bolts on the back and three torx screws inside the res. after removing the res. loosen the clamps on the hose under the bracket and remove the the nipple ( 14 mm allen through the top of bracket) replace the hose and reveerse the procedure.
Mike
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#11
01-24-2007, 07:58 PM
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Here is the link to the pump... I do not believe it has the hose you talking about....
http://catalog.eautopartscatalog.com/mercedesshop/sophio/wizard.jsp?partner=mercedesshop&clientid=catalog.mercedesshop&baseurl=http://catalog.peachparts.com/&cookieid=1ZO1CNISH20116RI4I&year=1997&make=MB&model=E-420-002&category=M&part=P%2FS+Pump
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2008 S550 2010 GLK350 1997 E420 (retired) 2005 CLK500 (retired)
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Linear Mode
