That happens to be a feature of my first car, a 1961 Peugeot 403. Seats folded perfectly flat to form a 'camp bed'. Here's a blog where you can see it--it is found on the first page of the second set of the manual.
Loved that car, but the engine and especially the cooling system struggled in California. The other problem was that the car seat rails were built for lighter Europeans. I was all the time bending the seat rails.
http://peugeot403arg.blogspot.ae/
Loved that car, but the engine and especially the cooling system struggled in California. The other problem was that the car seat rails were built for lighter Europeans. I was all the time bending the seat rails.