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Thermostat electrical connector

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Old 05-05-2016, 05:51 AM
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2008 C63, 2008 ML550, 2014 KTM 500 XC W, John Deere 990
Thermostat electrical connector
I have a 2008 ML 550 that I recently changed the thermostat on. the thermostat housing has a two-wire electrical connector on it. My question is what is it for?
I don't believe it is a coolant temp sensor as the coolant temp sensor is in the back of the engine.

My best guess is a thermostat valve position sensor or some kind of flow sensor.
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Old 05-05-2016, 08:46 AM
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1999 E300TD
Bingo----you win a trip to Plains!!
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Old 05-05-2016, 09:28 AM
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So which is it, flow or position?
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Old 05-05-2016, 02:31 PM
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Originally Posted by Euler
So which is it, flow or position?
Your three disc thermostat reports to the ECU the coolant temp. It has three positions 40-65-100C therefore it does both--- at the appropriate temp it opens and a flow results---bla bla
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Old 05-05-2016, 04:49 PM
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Originally Posted by Plutoe
Your three disc thermostat reports to the ECU the coolant temp. It has three positions 40-65-100C therefore it does both--- at the appropriate temp it opens and a flow results---bla bra
Now that wasn't so hard. Thanks. You'll be getting a postcard from Plains.
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