I'm sure you will be able to confirm thatin a couple of weeks TTP, when both your car and winter arrive in PGNo. My understanding is that heated seats have their own switch, and the heated side mirrors are trigger by the rear window defrost button.
Do you have your winter tires/ wheels sorted out ? ( asuming you will keep it on the road ) Also have you looked into car insurance ?I can't really argue that this won't happen...
Mid-September arrival for the car (hopefully), and then first snowfall probably a month and a half after that...Frost on my windows earlier than that, still! Trust me when I say that the heated seats are a huge plus!