A multichamber tank for motor vehicles comprises two chambers (4, 5) connected via a constricted region (6) located high up in the chambers, a first chamber (4) having a filler neck (2), and a line (13) bridging the constriction forming the connection to a second chamber (5). In order that both chambers are filled at approximately the same speed during filling-up through the filler neck (2), a pump (11) designed for level equalization during filling-up and driven by an electric motor (12) is provided in the line (13), and a level sensor (17, 18) is provided in each of the two chambers (4, 5), the output signals of which sensors are available to a control unit (14) which controls the electric motor (12) of the pump (11).