Patent ID: 7248143

Claim:
An access and right of use system for a motor vehicle that is designed for an access authorization request both with and without the use of a transponder, comprising: a system architecture that allows for access authorization requests that are purely mechanical, purely wireless, and both mechanical and wireless, a mechanical key to initiate an access authorization request that has a key bit for a mechanical access authorization request and a housing that is designed to hold a transponder, wherein the housing comprises a transponder when the system architecture is selected for purely wireless or both mechanical and wireless access authorization requests and does not comprise a transponder when the system architecture is selected for a purely mechanical access authorization request, a key acceptance unit that has a mechanical lock for holding the appropriate key bit and is designed to hold an immobilizer coil, wherein the lock comprises an immobilizer coil when the system architecture is selected for purely wireless or both mechanical and wireless access authorization requests and does not comprise an immobilizer coil when the system architecture is selected for a purely mechanical access authorization request, and a control device having a first controllable switch that is connected to the key acceptance unit via a connecting line and can be supplied with energy via the key acceptance unit, and a diagnostic and evaluation circuit for processing and evaluating the access authorization request and which is designed to process and evaluate access authorization requests that are purely mechanical via the key bit, purely wireless via the transponder/immobilizer coil, and both mechanical and wireless via the key bit and transponder/immobilizer coil, wherein the control device comprises a modulating/demodulating unit that via a connecting line is at least connected to the key acceptance unit that is connected to the diagnostic and evaluation unit and via which a wireless access authorization request can be demodulated.