In this case the features are literally spelled out right there on the product. Just about every square foot of the vehicle had something written on it - anti-lock brakes, LED running lights, pedestrian detection, you name it! A sort of written equivalent of the visible car (such as this 1939 plexiglass Pontiac). Actually, probably better than a visible car - since the marketing department can craft the message to the audience.
I will leave it up you, faithful readers, to suggest how this might be applied to carsharing vehicles.