c3 steering wheel upgrade

[nikosharitos]

Hello to all members !
i'm in a dead end...have purchased a c3 2018 bluehdi.It was a rental car very basic edition.So the steering wheel had no mounted radio controls...

The radio system is without wide screen it the simple one.But i have noticed other versions with the same radio system and they have steering wheel controls

So i found a spare part steering wheel with controls

I have installed the new steering wheel but the radio controls are not functional.
i wonder if someone could enlight me where is the problem. It has to do with the configuration BSI ?Is there any cable line missing from the steering wheel angle sensor to the radio?How can i find a wiring diagram for this?
Please any help is appreciated.

[GiveMeABreak]

You probably don't have the requisite Head Unit or required wiring - so that's a non-starter I suspect - probably a very basic model as a rental car.