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Old 01-30-2017, 11:43 AM
Join Date: Apr 2012
Posts: 320
x27 connector wire harness (?) near oil filter defrayed

I posted this same issue in the diesel forum earlier and realized that I was in the wrong forum.

On my Mercedes E320 wagon, I noticed the three wires are open and frayed, cracked near over the top of the oil filter. I believed it is connected to the firewall x27 in front of the oil filter. I need to know what is the name and part number of this particular wire harness. The oil warning light cames on in the instrument panel cluster and goes away after awhile, like 10 minutes or so. In addition, on the instrument cluster panel, the oil pressure needle is sloppy around. I don't think it is the postive battery cable. I also researched the issue and found out that in addition to the main wire harness that is part of the infamous biogradeable harness, that particular wire harness is also subjected to the biogradeable issues. Does this particular wire harness goes to the oil sender unit/sensor as well as the oil pressure unit. I don't know if I have to replace the oil level sender, part number 124-542-00-17 and/or Sender Unit Oil Pressure Sensor 0065429417.
Can anyone shed a light or two on this issue?

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Old 01-30-2017, 01:48 PM
Join Date: Apr 2012
Posts: 320
I can't seem to find the correct name and part number for the issue I am having on my 1994 Mercedes E320 wagon. I came up with all sorts of part names:
lower engine harness, cable engine harness, starter harness, transmission harness, positive battery harness. Which one is the correct name and if possible, part number as well that relates to my issue? Comments, anyone?
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Old 01-30-2017, 02:16 PM
Registered User
Join Date: Jan 2004
Posts: 98
It's the lower engine harness. It's just 3 wires. Super easy to rebuild it yourself with a soldering iron and some new wire.
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Old 01-30-2017, 02:28 PM
Join Date: Apr 2012
Posts: 320
92-2.6 Thanks for responding back. I appreciated it. I still would like to know exactly what is the correct name of this particular lower engine harness and part number that is related to my issue. I would rather replace this lower engine harness with a newer one.
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Old 01-30-2017, 06:02 PM
Join Date: Apr 2012
Posts: 320
I was abled to found out that the correct name and part number is: Battery Positive Cable and Part Number: 1245404230 due to the extra wires that goes into the oil level sending unit and the oil pressure unit.

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