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Current, 90 300CE, 92 400E (Sold 95 E320,70 250C, 91 190 2.6, 91 420 SEL, 95 300D, 87 TD)
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Discussion Starter · #1 ·
This is the new part............................................................This is the old one. The pressure stays with the engine fully warmed up at almost 2 bar. The old one dropped all the way to zero at idle. :eek: Cleaned the car looks good! :cool:
 

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91 500SL 37k,90 300SE sold, 91 300E sold , 92 300E137k ,02 Kia Sedona ,I know..... its a Mini van.
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8,366 Posts
Bravo! love new parts! the needle jumps erratically on Dieter, thinking gauge after 225k toast
 

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1990 Mercedes-Benz 300E 3.0L 256K MI
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This is the new part............................................................This is the old one. The pressure stays with the engine fully warmed up at almost 2 bar. The old one dropped all the way to zero at idle. :eek: Cleaned the car looks good! :cool:

Was that an easy fix?
 

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86 190E 2.3L 16V, 2 95 320TE's, 02 S500
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Was that an easy fix?
This is a very, very easy fix. The pressure sending unit is threaded into the oil filter block mounted the engine. You'll have to remove your oil filter to R/R the sender. Look behind/below your oil filter.

Jayare
 

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Current, 90 300CE, 92 400E (Sold 95 E320,70 250C, 91 190 2.6, 91 420 SEL, 95 300D, 87 TD)
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Discussion Starter · #5 ·
Was that an easy fix?
I managed to do it on my m104 without removing the oil filter ..but I think I did have to remove the rear coolant hose... I believe you have a m103 and I can't say how that's done.
 

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1988 "Zender" 300CE Coupe, 2009 Renault Koleos, 2007 Kia Rio Sport
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1995 E320 wagon
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I managed to do it on my m104 without removing the oil filter ..but I think I did have to remove the rear coolant hose... I believe you have a m103 and I can't say how that's done.
This may be a stupid question, but did you have to drain all of the engine oil? I have an m104 engine, and my oil pressure suddenly dropped. No engine noise, and I can see oil splatter on the top end, so I believe it may be a sender issue.

*edit* another question. What brand did you use?
 

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Current, 90 300CE, 92 400E (Sold 95 E320,70 250C, 91 190 2.6, 91 420 SEL, 95 300D, 87 TD)
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Discussion Starter · #10 ·
This may be a stupid question, but did you have to drain all of the engine oil? I have an m104 engine, and my oil pressure suddenly dropped. No engine noise, and I can see oil splatter on the top end, so I believe it may be a sender issue.

*edit* another question. What brand did you use?
I used Bosch....I didn't have a splat of oil, But that doesn't mean your didn't fall apart. No you don't have to drain the oil as the oil is low in the pan and the sensor is on the top.....you may get some seepage.
 

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I used Bosch....I didn't have a splat of oil, But that doesn't mean your didn't fall apart. No you don't have to drain the oil as the oil is low in the pan and the sensor is on the top.....you may get some seepage.
Thanks for the reply, I'll swap in a new sensor and see what happens. How did you get the electrical plug off?

Does anyone happen to know the thread of the sender unit? I'm trying to find a mechanical gauge I can use to test the pressure.

*edit* Appears to be M12x1.5 according to the electronic service manual
 
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