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  #1  
Old 08-07-2010, 08:55 AM
pesuazo's Avatar
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Join Date: Oct 2002
Location: Near Raleigh, NC
Posts: 580
1994 E420 Oxygen Sensor

Cannot find anywhere the description of the wires coming from the plug.
4 wires:
2 whites
1 grey
1 black.

Which one is the signal?

I assume the other 3 are just heater and does not matter where they connect.

The New Denso sensor has 2 black, 1 blue (signal) and 1 white.

I am trying to match them up.

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1999 Porsche 996 Carrera Convertible
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1986 300E - SOLD, what a car
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  #2  
Old 08-07-2010, 09:22 AM
latief's Avatar
1993 300E 2.8- M104
 
Join Date: Aug 2009
Location: Gainesville, FL
Posts: 518
I think this is it.....just through google search

OE Heater White = Black = Black = Brown = White

OE Heater White = Black = Black = Brown = Red

OE Signal Black = Blue = White = Purple = Black

OE Ground Gray = White = Green = Tan

Edit:

Here is a better link

http://reviews.ebay.com/UNIVERSAL-OXYGEN-SENSOR-INSTALLATION-INSTRUCTIONS_W0QQugidZ10000000000991989?ssPageName=BUYGD:CAT:-1:LISTINGS:1
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  #3  
Old 08-08-2010, 05:11 PM
pesuazo's Avatar
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Join Date: Oct 2002
Location: Near Raleigh, NC
Posts: 580
Thanks guys.

I finally found the diagram in the CD.

White and White are the heater .

Grey Ground and Black is the signal wire.
Attached Thumbnails
1994 E420 Oxygen Sensor-o2-sensor-wiring.gif  

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1986 300E - SOLD, what a car
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