[Ekaros]

Most of them. Car manufacturers aren't too greatly in vertical integration. One could argue that having a car rental agency for manufacturer would be great idea. Get cars at cost, rent them short to medium term, keep maintenance inhouse sell them after some period for most of the price.

But I don't think there is any manufacturers that rent vehicles for short term and neither there are any rental firms that manufacture their cars...

In the end making things and renting them is different businesses.