Sorry to drag up this old post, but I wanted to correct a mistake of mine. Apparently, my assumptions about when the monovalve should and shouldn't be getting voltage was incorrect. I had assumed 12V = Open, but I have seen another post which directly contradicts that assumption......

I'll have to go stick a meter on mine to be sure......

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-tp


1990 300SE "Corinne"- 145k daily driver - street modified differential - PARTING OUT OR SELLING SOON - PORTLAND OR. AREA - PM ME FOR DETAILS
1988 560SEL "Gunther"- 190K passes anything except a gas station
1997 S420 - 265k just bought it with a rebuilt trans. Lovely condition