My FastTrack didn't work on the first try with my new Model S. I may have a dead battery, but does the Model S have a metal oxide windshield? That could also explain it.
Yes, coating seriously restricts EZPass and like devices...use volkerize.com to search forums.
Look at www.teslamotorsclub.com too and search forums--lots of info.
I live in FL and will be taking delivery in a couple of days. Looking at the SunPass website it lists the Model S on the list of vehicles that will not work with any of the windshield mounted options and would require a front plate mount. I have heard of it being mounted behind the nose cone successfully.
Yes-you can mount the transponders behind the nose cone. Search the TMC forums....
@ScottEV. I live in Florida and I have been using the original Sunpass (the big one with batteries and display) mounted to the right of rear view mirror stalk with no problems
I live in Jupiter, FL. Brought my MS to the dealer with the under-the-hood Sunpass and they installed it for me.