I lifted the windshield reservoir and discovered vaccum line on the bottom of that switch was not connected. The line went into the manifold area. I reconnected the line, drove < 2miles and engine temp rose quickly to 115. Lots of "gurgling" sounds coming from dash area. I got home and disconnected that line and now engine temp rises all the way to 120 with both aux. fans running.
I noticed a third nipple on top of that switch under the washer reservoir with no noticable lines in the area. Did I hook up the line to the wrong nipple? Did the thermostat crap out incidentally?

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Free your heel and your mind will follow!

Got home, checked coolant level and was MT. Filled up with MB coolant tap water mix and temps are normal and CEL not on yet. Thanks MB DOC.

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Free your heel and your mind will follow!