[Skeewiff03]

Hello guys, the following is for a G20, but said to try my lack/people's knowledge here as well, since G05 owner do not necessarily read other forums.

Going through the G05 (X5) technical document, cos I cannot find any G20 ones (Anyone?), I can see that the single RFK (6) is connected directly to the Body Domain Controller (4) via Ethernet.
I also understand that all of our cars come already with the BDC, therefore wouldn't a retrofit just involve, pulling a 2wire Ethernet wire from the back of the car to the side BDC and then re-coding the Idrive?

Anyone with any knowledge in this things would be great assistance. How ease would be to pull off?