I did all the fitting myself and yes I got a separate kit which makes the steering wheel controls work
https://www.dynamicsounds.co.uk/volv...BoCBREQAvD_BwE
Apparently you can get the old screens and mod them to work with a Pi unit or similar but i didn't have the time to spend working all that out lol. Shame because the main advantage there is the positioning in terms of map being in your eye line while driving.. but then you wouldn't have the touch screen and you'd still have to work out some sort of Bluetooth set up, so swings and roundabouts really I guess. Besides you've got the woman giving you directions anyway
If you're into your audio it also has all the necessary outputs and a pretty decent EQ