Ello again stripey
Right, dials. Nice! If you come across another set LET ME HAVE THEM lol
. Firstly, make sure that the mileage of the old set is less than your car's, or else the body computer will up your mileage (so I'm told).
Also, I don't know if it'll repeat the Sat Nav; when we installed it, we put a whole new dash loom in to pick up connector P20, which gave the Connect an extra CAN line feed. That may transmit directions onto the dashboard. You'll just have to see.
As for the steering buttons, as previously discussed, you'll need a new clockspring, and then they'll work
Hope all goes well.