Patent ID: 6963794

Claim:
A system for automatic access or driving authorization for a motor vehicle, said system comprising: a first device in the form of a control device having at least two states for engaging and disengaging one of vehicle door locks, an ignition lock, a steering wheel locking means, a vehicle immobilizer and an engine control unit; and a second device in the form of one of an electronic key, an ID transmitter and a chip card; wherein, each of first and second devices has means for transmitting and receiving signals, including a coded operating signal for authenticating the second device; after a positive evaluation of a coded operating signal, a change in state of the first device can be brought about when the second device is authorized; before the second device is first activated, it is initially in a sleep state in which automatic function is not permitted and which has reduced consumption of energy; during a first, operator-dependent, authentication, the second device is changed over from the sleep state into a standby state in which an automatic function is at least partially made possible; and said first authentication is actuatable after the second device has been inserted into a receptacle of an electronic ignition lock.