It's a 2016 Ford S-Max (2015 edition). The electric windshield heating was, I think, part of the "winter" package and not standard issue but it's an option avai

It's a 2016 Ford S-Max (2015 edition). The electric windshield heating was, I think, part of the "winter" package and not standard issue but it's an option available in many models from many different car companies. I'm not sure how the electric hot air works but I'm guessing it's part of the A/C (likely literally just a heating coil that is turned on if the supplied intake air is colder than the A/C setting). The only issue with electric windshield heating is that the wiring in the windshield makes them more expensive and thus more expensive to replace. It's definitely more common in temperate to colder places (for context: I'm in North Germany).