Noticed yesterday that the seat warmer stays on, even if a seat is not occupied. Seems like the sensors could trigger the warmers to shut off when nobody is seated there.
Then you would not be able to precondition the car. Setting the climate control and seat warmers from the app before leaving is one of my favorite features of the car.
Yeah, the seat warmers only use maybe 500 watts of power? It's not much or anything to worry about. I agree with stingray.
And it’s easy enough to turn off the seat warmer for the unoccupied seat.