The invention discloses a filling system for an operating fluid container (1) of a motor vehicle, comprising a filling hose (10) and at least one filling hose holding device (20). The filling hose holding device (20) can be fastened in an installation space of the motor vehicle, and the filling hose (10) can be fluid-connected to an operating fluid container (1) and to a filling neck (30). The filling hose (10) can be fastened in the installation space of the motor vehicle by means of the filling hose holding device (20) in such a manner that the filling hose (10) follows a contour defined by the filling hose holding device (20).