Car Config lets you change parameters in the vehicle configuration data, letting you exchange units (not part of the immoibliser system), add extras previously not present in the vehicle, etc. Once you open the function you have the option to read the Master CCC or Back-up CCC (if available), edit and update the configuration.

In the picture below you can see an example on how to set the vehicle to be with automatic gearbox, previosly using manual transmission.