In the case of a window cleaning system for a motor vehicle, a washing fluid line (6) is manufactured integrally with plug-type coupling parts (8). Movable components and a sealing ring (15) are arranged on bushing-type coupling parts (9). The bushing-type coupling parts (9) are arranged on a washing fluid pump (2), on washing nozzles (4) and on a T connector (7). By this means, the window cleaning system is constructed in a particularly simple manner and can be manufactured cost-effectively.