i have a 98 cadillac catera. and i have alot of features on my car that i dont know about. i dont have the manual so its hard to really know.i havent started my car up for a couple of days now because i have been sick but i go out and check on it every now and then, but when i went to check on it yesterday the inside windows were foggy and i opened the door and touch the window and it was like condensation from a steam shower. i felt heat in the lower level of the car by the seats. i wanted to know do anybody know whats causing this or does the car do it on its own to keep warm i have heated seats but again i havent started my car up so i think the heated seats wouldnt work unless my car has been started can some one please give me a good answer?