This will probably be impossible to get running as a stock ecu.

The electronic throttle from magneti marelli has to be driven and regulated via special, non open can protocol.
I know no standalone aftermarket ecu which can do that. It will close itself, when not "used" correct.

Then you have to fulfill the also non open can bus answers and responses of central electronic module and instruments, also brake controller.

I guess you have no haldex controlled AWD since it is used only with 2.5T.
If automatic transmission, this will be impossible.

A good resource for some wiring diagrams is matthewsvolvosite.


Good luck with that task