A motor vehicle has an automatically controllable rear-tailgate arrangement, which either is comprised of a single pivotable tailgate or a pivotable lower tailgate and a pivotable upper tailgate. An electronic control unit for the motorized control of the pivotable tailgates is associated with the rear-tailgate arrangement assembly. In particular, the control unit is designed to perform the following functionality by an appropriately programmed function module: the control unit evaluates information of a sensor unit for sensing the longitudinal tilt of the motor vehicle; after an opening command by an operating person, the control unit prevents complete opening either of the single rear tailgate or at least of the lower rear tailgate at least in the case of a rearward longitudinal tilt exceeding a defined threshold.