I bought an upgrade Abarth wheel for my Twinair off ebay. Cost £150
I fitted it myself and I can tell you for sure tat the wiring for the radio controls and Blue and Me are not there. The buttons do not function unless you already had these functions on your old steering wheel.
The fitting was quite easy except for having to remove the 'lock nut' that is fitted before and then folded over the two nuts that hold the steering wheel on the spline.
Took me nearly two hours to 'chip' this away to gain access to the nut.
If I had my time again I would have simple put a socket over the whole assembly and wound the locking part and the nuts off together.
Hope this helps,
Ian.