Heated seats were an expensive option on Cadillacs in the late Six ties, but Saab was the first to offer them as standard from 1972 – and it was because one of the bosses had a bad back. The system was designed to turn on automatically if the outside temperature was below 14°C, which is basically the whole year in Sweden. (It was also first to introduce seatbelts as standard, which is probably more impor tant now we think about it.)