I have a model S LR and have run some tests and there is no coating on the windshield. I also spend a few hours trying to find a hardware location as there does not appear to be a fuse box. I quit after tapping into what I thought was a good source only to get multiple warnings on my car. I ended up ordering extra long 12v cable and will plug it in the outlet. If someone find a 12v hardware option I would love to know.