Wiring very unlikely to be in place. Eleganza had electric mirrors as standard, these were also supposed to be heated too. I have an Alessi special edition, which was based on the Eleganza, but although it has electric mirrors, they are not heated. The heating circuit is not in the car, no wiring, no fuse, not even any electrical feed to the fuse position, so very difficult to install. On this basis, I doubt the wiring is in place on lower models.