Hi,

I can't remember exactly which languages are available, I will make a list next time I connect to mine. It has to be updated via tech2 and SPS to update the firmware.

Yes you need to program the Variant Configuration of the GID, the mobile phone portal needs to be present, which is the same for astras, vectras, zafiras. The code index is specific to the zafira, but this has nothing to do with bluetooth.

I believe the other end of the AUX will lead to a black connector under the cup holder to the rear of the handbrake, so you need to remove this.