Ingineer wrote:There has been a number of cars with windshields equipped with metallic film defrosters. It would make a lot of sense on an EV. (The GM EV-1 had it) Problem is they do not pass radio waves, so your cell phone and things like toll transponders will not work well, if at all, so in recent years they have become less popular.
I believe Model S has this feature, and there are a lot of complaints about garage door openers not working. They left a "window" behind the rear view mirror so that you have to put the transmitter there to transmit out of the car, and mount the FastPass there for toll road transmitters. I imagine it hurts cell phone signals and dash mounted GPS as well, although I'm not sure why you would need to use a Garmin in the Model S with the big 17" nav screen.