Hi Gutted!
Have done what you're describing, on a 2.5 (S2) XM.
This is a write-up of it, including how the steering wheel controls were retained...
http://www.club-xm.co.uk/forum/viewtopi ... =13&t=9283.
The Sony CDX-G1302 (green display) is still available. Have quite recently put one into our BX.
If you need DAB and bluetooth, you'll need to look further up the Sony range. Hopefully, their 3.5mm (remote control) jack, which used a simple resistive chain for function control, is used on other models too. If not, maybe they offer a matching remote of their own. If stuck, let me know the model number of any Sony you're interested in, and I can perhaps help look into remote possibilities.
We do remote possibilities rather well on FCF, y'know.
