A locking system for the access and/or driving authorization in a motor vehicle in the manner of a keyless entry/go functionality comprising a first device having at least two states and being formed as control device, such as a control device for unlocking and/or locking the car doors, the tailgate, and comprising an associated second device formed in the manner of an electronic key, an ID signal transmitter, a chip card, wherein the two devices (4, 5) have, for their intended operation, transmitters and/or receivers (11, 12) for electromagnetic signals, wherein at least one of the signals transmitted between the second device and the first device is an encoded operating signal for authenticating the second device, so that, after positive evaluation of the transmitted operating signal when the second device is authorized, a change of the state of the first device can be effected, and comprising a first energy store for supplying energy to the first device for the intended operation thereof as well as comprising a second energy store for supplying energy to the second device for the intended operation thereof, wherein a coil arranged in the region of the door handle in and/or at the car door is assigned to the first device as an energy transmission means for transmitting energy from the first energy store, wherein the second device comprises a transponder in such a way that energy can be transmitted from the first energy store to the second device by means of the energy transmission means for the emergency operation of said second device when the second energy store is depleted, and wherein the first device is assigned an emergency battery having such a storage capacity that when the first energy store is depleted, the energy of said emergency battery is sufficient for the emergency operation of the first device with at least a one-time, in particular a repeated, change of the state of the first device, wherein the coil, which serves as energy transmission means, is formed in the manner of an LF (Low Frequency) coil, and that a further coil in the manner of an LF (Low Frequency) coil is provided in the motor vehicle as further energy transmission means to transmit energy from the first energy store to the second device, that when the second energy store is depleted, the driving authorization can be activated by means of the transponder, wherein the transmitted energy serves for the communication to start the motor vehicle, that the further energy transmission means is arranged in the region of the center console, that in addition to the energy supply by means of the energy transmission means for the second device, the encoded operating signal for authenticating the second device is transmitted by means of the transponder as well as the energy transmission means when the second energy store is depleted, and that when the first energy store is depleted, the encoded operating signal for authenticating the second device is transmitted by means of the transponder as well as the energy transmission means, wherein the same transponder for energy consumption and signal transmission is formed with the coil of the locking mechanism as well as with the further coil in the center console, and wherein the state of the emergency battery is monitored by means of a diagnostic control unit in such a way that the emergency battery can be replaced, if necessary.