'59 Buick Electra 225!
That's also one of my favorite cars of the fin era, just like the 59 Cadillac 4 door flat-top. I must have been 7 or 8 when I first saw a car like this, a pillarless 4 door, it was shiny black with all red leather interior, an astonishing combination for the time, automatic transmission, power steering, power brakes, power seats, power windows and power vents and factory air conditioning, which blew ice cold. But the best feature of all was that the car had air suspension, it literally rode like a cloud. It belonged to a friend of my father, an Argentine diplomat who'd brought it to Argentina from the States. It was the export model, the speedometer was in kilometers, and it went all the way up to 200! We saw the car just two or three times, it was shiny new at the time!
A couple of years later someone told my father the owner had had severe issues with the air suspension. The whole system leaked constantly, when stopped the car would lie flat on the floor, and the bellows kept puncturing or rupturing, or something like that. Worst of all, there were no spares for the air suspension in this country, the owner had no choice but to sell the car for pennies because of this issue, which couldn't be solved.
Thanks to the internet I know now that all GM air suspension cars of the era were recalled and the air suspension was changed at the dealer for the standard spring suspension, the option turned out to be a disaster for GM (actually to the owners of the cars!).
Emilio