My grandmother had a baby-blue, 1956 Cadillac. I was always fascinated by the hinged, driver-side [IIRC] tail-light that flipped up to fill the gas tank.
As tiny children, we also loved the rear-seat, center, fold-down armrest which we assumed was a booster seat for, well, tiny children. No car-seat contraptions then, baby. We roamed free!
I remember falling asleep on the deck behind the back seat of my Dads 51 Buick.
In the 1970s, the combination of vinyl bench seats and polyester pants made every turn an amusement park ride!
Mark