CAS3 - Car Access System 3
The Car Access System now features the 3rd generation of control units. The electronic
vehicle immobilizer 4 (EWS 4) is also used in connection with the Car Access System 3.
The previous functions of the electronic vehicle immobilizer 3 have been retained.
The Car Access System 3 can therefore be operated together with the electronic vehicle
immobilizer 3 or 4. The digital motor electronics and the Car Access System 3 are
incorporated in the overall electronic vehicle immobilizer system in the E70.
In addition, the electronic transmission control is used as a further immobilizer in the
E70. The electronic vehicle immobilizer 4 improves the antitheft properties of the
vehicle. A longer cryptic code is used for the data exchange.
The cryptic code provides the enable to start the engine. The Car Access System 3 is
backwards compatible with the Car Access System 2. This means the functions of the
Car Access System 2 are also included in the Car Access System 3.
The electronic vehicle immobilizer 3 or the electronic vehicle immobilizer 4 is used
depending on the engine installed and the associated digital engine management.
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