While we weren't looking for power folding mirrors to seal the deal, we were very concerned about the size of the Model S getting into and out of our garage. We don't have a straight approach, our driveway pretty much dictates backing into the garage while turning hard to squeeze in diagonally. Our RX450h already seemed like a slightly tight fit and the Model S specs show it as four inches wider and eight inches longer. Yikes.
We did eventually pull the trigger and prepared ourselves for a garage remodel if strictly necessary. As it turns out, I'm delighted to report that it hasn't been a problem at all. There were a few factors that helped: (a) the Model S has a surprisingly tight turning radius for a car of its size, which helped in our situation, and (b) most vehicles widths are measured without the mirrors. The mirrors on the Model S don't stick out nearly as far as some vehicles, presumably as an intentional part of the aerodynamic design. Mirrors included, it's only a little over 2 inches wider than the vehicle we were used to parking.