WHAT IS CAN BUS?

The CAN BUS communications protocol is a 'high speed communication language' that is
used by many new vehicles on or after the year 2004.

You may try using this method of communication, which is enabled in the device by default, for communicating with i.e: Vectra, the new Astra F and the new Ford Focus, this to name but a few.

When you enter the EURO program choose to communicate with these vehicles via Method #5 and you will achieve CAN BUS communication.