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Old 04-10-2009, 05:18 PM
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EricSilver EricSilver is offline
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Join Date: Mar 2000
Location: Fairfax, VA
Posts: 1,322
OK Wait --

Called my local dealer and they said the thermostat housing has the one-prong sender for the dash gauge, and the four-spade is for for the aux fans.

I saw a diagram with another one sticking out sideways (I believe for a 1994 car), but I don't have that on my thermostat housing -- just a flat bolt sealing what could be a potential opening. So which one connects to the fuel injection/ECU system?
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2008 E350 4matic / Black/Anthracite

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