By way of confirmation and with a tip o' the hat to synchronicity, here's the paragraph I read last night in "Medical Center" by Faith Baldwin:
Danny and the McDonald car rolled for them at a quarter past seven. Sophie, smiling into Danny's interested eyes--she couldn't help smiling at any man and any man's eyes would have been interested--settled herself under the robe with a sigh of comfort. She said, "This is what I call luxury."What's interesting here is not the confirmation of the "car robe theory," but rather the fact that this book was written in 1940...and they still hadn't designed a car heater. I wonder when this amazing innovation finally came about?