Optical system for a vehicle, cleaning device and vehicle comprising an optical system

The invention relates to an Optical system (24) for a vehicle with at least one movable vehicle element which is movable with respect to a main vehicle body, comprising at least one first surface, and a cleaning device for cleaning of at least the first surface, wherein the cleaning device comprises a cleaning liquid emitter. The optical system is characterized by a reservoir for a cleaning liquid (20), wherein the reservoir and the cleaning liquid emitter are configured to be mutually mounted to the movable vehicle element.