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  #1  
Old 01-25-2007, 10:49 PM
Registered User
 
Join Date: Sep 2005
Location: SW Florida
Posts: 10
Red face W124 Oil Pressure Sending Unit Replacement

Hello,
I have found that my Oil Pressure Gauge on my 1992 300E (aka "Black Beauty")is pinned at "Zero". I took "Black Beauty" to Mercedes Benz of Naples for an estimate to have it remedied. They told me that "after removing the instrument cluster and troubleshooting the system that the Oil Pressure Sending Unit was kaput. They estimated over $300 to do the job.
I would like to do the work myself. I have located the Oil Pressure Sending Unit next to the Oil Filter but the work space is extremely limited.
Before I order the part (approx $53) I would like acquire instructions on the DIY for its replacement.
Would anyone be so kind as to help me?
I would greatly appreciate any anticipated assistance.

Hank Halbuer
1992 300E "Black Beauty" 123,000 miles
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  #2  
Old 01-26-2007, 04:43 AM
1990 300se
 
Join Date: Oct 2005
Location: Honolulu, Hawaii
Posts: 111
I did this on my car a few months ago but don't remember if the '92 300e's have m103 motors. If they do, all you have to do is unplug the wire, then I think I used a 22mm wrench (same size as the o2 sensor) to loosen it. I did this from below while doing the transmission filter, as I had a rather long wrench and there's not too much room from above. I did the rest by hand from above and let it drop down and went back down under the car to put the new one in. You could probably do it from above, though it might be tight. Good luck!
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  #3  
Old 01-26-2007, 11:40 AM
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Join Date: Apr 2002
Location: westchester, ny
Posts: 746
I did this from above a year or so ago. It was tight but doable with the short oem wrench in the mb toolkit, as I recall. Check my previous posts.
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87 300e (white/black; amg body kit)
88 300ce (red/cream; amg body kit)
93 300ce cabrio (white/blue/blue top)
93 300ce cabrio (black/grey/black top)
98 ml 320 (totaled @ 137,000 miles)
99 clk320 (black/grey/black top)
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