that's pretty interesting. The reciever for the key remote is the antenna amplifier, and to control the central locking system they would have to "hack" into the general module and trip it. But this should really only be possible through the bluetooth reciever.
You would have to know the frequency at which the key remotes operate at, then figure out how to read the proper code, then find a way to manipulate that code some other way and transmit it to the reciever.
Once in the car, you would need to figure out how to talk to the EWS module, via AM radio signal, to find out which one of 200 rolling codes it, and the DME are on, and send that signal to the EWS.
But, then there is the problem of how do you get the ignition turned
Without the proper key, the tumbler will just spin freely. And to get the electrical switch itself off, you would need to put yourself in a position that no car theif will ever put themselves in. And that's in an immobile, blind position. IE laying on your back under the steering column
so, on that note, i call bullshit