Automatic a/c installation

[Regu]

I am wondering can I just go and buy automatic a/c components and install those to my a4b5 or is it true that cars with aa/c have different wiring loom?

Sorry about bad english, I´m from finland and we speak rally english ;)

[offroader1006]

i know for sure the wiring is different,

to what extent, i am not 100% on.

the automatic climate control cars have an interior temp sensor in the panel.

[Regu]

Thanks for information maybe I just install common a/c, but if anyone knows how much different that wiring is I would like to know.