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.

gasnomo | 25/06/2013

Yes, coating seriously restricts EZPass and like devices...use to search forums.

JPPTM | 26/06/2013

Look at too and search forums--lots of info.

scottEV | 26/06/2013

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.

JPPTM | 27/06/2013

Yes-you can mount the transponders behind the nose cone. Search the TMC forums....

PBEndo | 27/06/2013

@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

jeffrey.begens | 27/06/2013

I live in Jupiter, FL. Brought my MS to the dealer with the under-the-hood Sunpass and they installed it for me.