I have a mk6.5 tdci zetec s Fiesta as my mile muncher and my son had one as his first car but put a post through the boot. His car had the digital climate control and auto lights and wipers and mine doesn't, how hard would it be to swap them into mine?

Is it a case of plug and play or would I need to change the whole loom, would it need any type of coding? I know the heater box would need changing as well as the windscreen but how hard would the wiring be? I really couldn't be arsed to strip and sell it and would end up just scrapping it so would like to make use of some of the bits before it goes.

Any help would be much appreciated.