1985 300SD power steering filter replacement
You may want to install a new lid seal during this DIY repair.

#1. Remove lid from power steering reservoir.
#2. Remove ten millimeter nut from spring retainer/fluid level indicator.
#3. Remove spring retainer/fluid level indicator.
#4. Remove spring.
#5. Remove old filter with needel nosed pliers.
#6. Install new filter with needel nosed pliers.
#7. Install spring.
#8. Install spring retainer/fluid level indicator.
#9. Install ten millimeter nut.
#10. Install lid for power steering reservoir.

PART NUMBER SEARCH RESULTS WITH PRICES
Vehicle 1985 Mercedes Benz 300SD
Part: P/S Filter
Note: Metal Reinforced
Late style

M2000-97891 P/S Filter Hengst IN STOCK $4.46

M2000-97891 P/S Filter Mann IN STOCK $4.32

http://catalog.eautopartscatalog.com/mercedesshop/sophio/wizard.jsp?partner=mercedesshop&clientid=catalog.mercedesshop&baseurl=http://catalog.peachparts.com/&cookieid=1LF18P73G1MW1CZWBA&year=1985&make=MB&model=300-SD-002&category=All&part=P%2FS+Filter


PART NUMBER SEARCH RESULTS WITH PRICES
Vehicle 1985 Mercedes Benz 300SD
Part: P/S Reservoir Gasket
Note: to Power Steering Pump

M2032-70025 P/S Reservoir Gasket IN STOCK $8.94

http://catalog.eautopartscatalog.com/mercedesshop/sophio/wizard.jsp?partner=mercedesshop&clientid=catalog.mercedesshop&baseurl=http://catalog.peachparts.com/&cookieid=1LF18P73G1MW1CZWBA&year=1985&make=MB&model=300-SD-002&category=M&part=P%2FS+Reservoir+Gasket

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Prototype R&D/testing:
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Dynamometer.
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1985 300SD
1983 300D
2003 Volvo V70

https://www.boldegoist.com/

power steering filter replace, pics#2.

Attached Thumbnails

     

__________________
ASE Master Mechanic
https://whunter.carrd.co/

Prototype R&D/testing:
Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician.
Noise Vibration and Harshness (NVH).
Dynamometer.
Heat exchanger durability.
HV-A/C Climate Control.
Vehicle build.
Fleet Durability
Technical Quality Auditor.
Automotive Technical Writer

1985 300SD
1983 300D
2003 Volvo V70

https://www.boldegoist.com/

When you do step #2 (removing spring retainer nut) Carefully, ease the tension off of the spring or that nut may be launched into never-to-be-seen-again land! Fortunately, my brother was watching and saw where it landed.

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Sam

84 300SD 350K+ miles ( Blue Belle )

What is the factory service interval for this filter change?

That's what I'm wondering... I'd say every 10K or so?



Also, I drain that pump each time I change the filter. That fluid can be nasty!

__________________
I'm not a doctor, but I'll have a look.

'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

Liberty will not descend to a people; a people must raise themselves to liberty.[/IMG]

Nothing in the books that I can find. So, I'd say every 50,000 to 100,000 miles, unless you have nothing else to do.

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Paul 1987 300 SDL; 2000 ML; '69 MGB; '68 VW Fastback

LMAO.....While your at it take an extra 5 minutes and flush the old fluid out:

Flush your power steering - baby its gross in there

Danny

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1984 300SD Turbo Diesel 150,000 miles

OBK member #23

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(")_(") signature to help him gain world domination

I would suggest every 30,000 miles. For some M-Bs (like my '96 E300D) there doesn't seem to be a factory spec--the first PO took the car to the dealer for everything and changing the PS fluid was never mentioned (W210 has no filter). It looked to me as if the fluid had never been changed in 248,000 miles -- it was black and the pump was performing poorly at low engine speeds. I flushed the system and will repeat it after a few thousand miles just to make sure.

Jeremy

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"Buster" in the '95

Our all-Diesel family
1996 E300D (W210) . .338,000 miles Wife's car
2005 E320 CDI . . 113,000 miles My car
Santa Rosa population 176,762 (2022)
Total. . . . . . . . . . . . 627,762
"Oh lord won't you buy me a Mercedes Benz."
-- Janis Joplin, October 1, 1970

I don't think it was ever flushed until I got a hold of it either. Mine too was noisy and labored at idle. A flush and filter did the trick.

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1985 500SL Euro w/ AMG bits 130k
1984 300SD Turbodiesel 192k
1980 240D Stick China 188k
2001 CLK55 AMG 101k
2007 S600 Biturbo 149k Overheated Project, IT'S ALIVE!!!

I have a 1981 300SD and when I take the lid off of my box there is no plastic piece, just a metal collar kind of clip on top of the spring. Am I missing something inside there or do I just need to take off that clip and follow the rest? My steering wheel has about 2 inches of play, by the way.

Mine looks like yours...wondering if PO lost the plastic spring clip when changing fluids and didn't bother to get another...just bought a used pump from a junkyard for $50. will open reservoir tomorrow and see what it looks like and compare.

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1982 300cd 245K miles and still goin'...

Does anyone have instruction how to install P/S Pump Repair Kit 1991 Mercedes Benz 190E?

Just flushed the goo out of mine and put a new filter. Thanks for the heads up Roy.



Jim

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Jim Messina

1983 300 SD
2006 Silverado Z71

That metal spring clip is a lock ring, there were different styles.

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83 SD

84 CD

Here's a pic of the "other" style, with the metal clip. Just wiggle that clip back and forth and the force of the spring will push it off.

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84 300D 255K "Mr B" ("Mr Becker")
79 300D 265K "Mrs B"
85 300TD 175K "Mali" (Sold)
74 Ford F-100 74K "Bonnie" (Sold)
67 Jeepster Commando (Sold)