Autonomous cars are the first major examples of Artificial Intelligence (AI) in everyday life. When cars are transformed into platforms,new service relationships emerge between car companies and the car users. These relationships generate gains and catches for both parts related to how physical and non-physical resources are exchanged in the sharing economy; how integrity is negotiated; and how responsibility is delegated when AI enables the car to take over most of the driving. With a "car as a platform approach", in this paper, we present a design fiction on ethical implications for citizens' daily lives with autonomous cars