The invention relates to a device (15) for operating an inductive charging system (1) for a motor vehicle (2), said device comprising: a fixed primary unit (4) of a charging station (3); a secondary unit (6) that is associated/can be associated with the motor vehicle (2); and means for positioning the motor vehicle (2) having the secondary unit (6) relative to the primary unit (4). According to the invention, the means have at least one ultra wide-band sensor (16, 17, 21).