The invention relates to a control System (2) for a motor vehicle (1), comprising a central vehicle Controller (3) for Controlling vehicle functions (4) and a plurality of driver assistance Systems (5). The driver assistance Systems (5) are set up to transmit a task key describing the particular assistance function thereof to the vehicle Controller (3) and to transmit a security key assigned to the particular assistance function to the vehicle Controller (3). The central vehicle Controller (3) is set up to identify a particular task of the driver assistance Systems (5) on the basis of the transmitted task keys, to carry out a security check by virtue of the vehicle Controller (3) checking, on the basis of the security keys transmitted in each case for the respectively identified tasks, whether the particular security key complies with at least one security level assigned to the particular task, and, if the security check was successful, to control the vehicle functions (4) according to respective control commands transmitted by the driver assistance System (5) in Order to perform the respective assistance functions. The invention also comprises a method for operating such a control System (2) and a motor vehicle (1) having such a control System (2).