The last two paragraphs are about a Uber like service which is different from the main subject of the article. However if I want to get my car back to where I parked it and not on the other side of the city, the last user must drive it back or BMW will. The first option will make the service totally unappealing, worse than all those failed parking to parking car sharing services. The second one costs money to BMW. So maybe the only users of this service are Uber drivers. They get my car for some hours, make some profit out of it, park it where I left it, go get another one. The cost of the rental must be low enough for them to make a meaningful profit though.