There was some sort of menu where I could pick between three cars: one with 4, one with 6, and one with 9 seats. The 4-seater was a rather normal car, but the other two had roofs with strange shapes, supposed to leave enough space for both passengers and their luggage. The 9-seater had some luggage boxes on the roof with glass or transparent plastic doors, so all the contents were visible from the outside.