Brake fluid reservoir for motor vehicle and filling tool of such reservoir

The reservoir (110) has a filling opening (111), and a liquid leveling duct (120) equipped with an upper opening (132) formed above a lower opening (131). A horizontal plane passes through an upper point (140) of the lower opening of the liquid leveling duct defining desired filling level of the reservoir. A sealing unit (121) is cooperated with another sealing unit provided on an automatic filling tool. The liquid leveling duct is arranged in an axis of the filling opening.