Abstract: A method for granting access and driving authorizations and driving commands to be carried out, in the form of a data format, for a vehicle. A plurality of data processing systems of different user groups, which exchange the data format via a plurality of communication connections, are used, and an exchange undertakes the distribution of the data format among the respective involved user groups and into the vehicle.

Abstract: A method for granting access and driving authorizations and driving commands to be carried out, in the form of a data format, for a vehicle. A plurality of data processing systems of different user groups, which exchange the data format via a plurality of communication connections, are used, and an exchange undertakes the distribution of the data format among the respective involved user groups and into the vehicle.

Abstract: In an indicator device for indicating an attempted theft of objects which are detachably fixed to a vehicle, at least one piezoelectric sensor is arranged in a recess between the vehicle and the object and is placed under pressure in an installation position of the object to be secured. In addition, a method for operating an indicator device for indicating an attempted theft of detachably fixed objects is proposed, in which method the piezoelectric sensor is kept under pressure. When the object is removed from the recess, the pressure acting on the piezoelectric sensor changes, as a result of which a transmission antenna which is connected to the sensor emits a signal in order to activate an alarm system.