Tempurpedic

It can be done. It has been done. This came from a magazine article or newsletter dated 1952.

With a twist of the wrist a Kaiser owner can convert his car interior into a bedroom–equipped with one of the softest beds made.

K-F Dealer M. H. Ripley inaugurated the “Make-A-Bed” feature to meet customer demand for a smartly styled, powerful automobile which could double for sleeping quarters on long trips. The “Make-A-Bed” accessory, which fits any 1951 or 1952 Kaiser 4-door sedan, is installed in two hours and permits the car seats to be converted into a double bed in just 10 seconds.

A lever similar to the seat adjustment rod–well out of site–permits the back of the front seat to recline until it fits snugly with the rear seat. The seat can also be adjusted in a reclining position.

via Built Better To Last