The display module/control unit is equipped with an electronic anti-theft protection that works in conjunction with the instrument cluster. The display module/control unit must be adapted to the respective vehicle using the Tester. The security code is no longer issued. The factory-fitted display module/control unit of the infotainment system is only adapted to the respective vehicle during initial power-up. Subsequent disconnection and reconnection of the battery or removal and reinstallation of the display module/infotainment system control unit in the same vehicle will no longer adapt to the respective vehicle. When replacing the instrument cluster, the display module/infotainment system control unit must be adapted to the respective vehicle again. The user must have valid rights to use the program for adapting the display module/infotainment control unit.