In the case of a control device for an at least partially four-wheel-driven motor vehicle, having a control unit which can variably distribute the driving torque of a drive unit to primary driving wheels, which are permanently connected with the drive unit, and to secondary driving wheels, which, if required, can be connected by way of a transfer clutch with the drive unit, wherein the control unit determines a desired clutch torque which is to be set by an actuator device at the transfer clutch. The control unit is further configured such that, when the desired clutch torque is determined, at least one degree of stress to the transfer clutch and/or at least one degree of stress to the actuator device are taken into account. In this case, the taking into account of a short-duration degree of stress to the transfer clutch is particularly important with a view to a closing which is as fast as possible for preventing a slip.

 
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> Hydrostatic vehicle drive system comprising a differential lock

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