A magnificent French solution for car doors…
Peugeot 1007 has two power sliding doors, according to the Wikipedia:
And as far as I know, they made the doors with option of remote control.
It is a pity that this practical door type is less prevalent in carmaker industry!
Self-levelling suspension by Citroen
For instance, the Citroën BX had this useful feature.
Honda S600 had pin bearings in its motor in 1965
Perhaps it is no coincidence that this company was asked by Mclaren to make engines their F-1 race cars.