The invention relates to a multi-disc clutch lock having a differential housing in which a differential pinion between axle bevel wheels, disc sets between the axle bevel wheels and the differential housing is untwisted, but thrust rings are arranged such as to be axially movable. Said multi-disc clutch lock comprises outer discs of the disc sets that are non-rotatably connected to the differential housing and inner discs that are non-rotatably connected to the axle bevel wheels. As a result, an introduced driving torque is transmitted via the differential pinion to the thrust rings in order to press the disc sets together with the axial forces produced under load on the oblique contact surface of the differential pinion. An axially movable thrust piece is arranged between at least one disc set and the differential housing in order to transmit a lifting movement initiated by an actuator to the disc set. According to a method according to the invention for operating such a multi-disc clutch lock, a multi-disc clutch lock is then applied to a disc set by an actuator, wherein the actuator is activated by a control device that has software which converts the signals coming from a vehicle CAN bus into a control signal for the actuator using a control logic.