I had a rental VW that no one could figure out how to start, even at Hertz. Someone from Hertz finally found the manual online. You actually have to take the key fob and insert it into a slot in the dash and push on it, like it's a gigantic button. When I got to the hotel, no one could figure out how to stop the engine but they had valet-only parking so I left it running. The valets eventually figured out you have to push the gigantic key fob button again and it will pop out.
I was so frustrated I initially went back into the rental agency and asked if they had any cars with keys (because even te employees could not figure out how to start the thing). Nope.