If you have the High Performace Audio (will say as much when you turn it on) then you should have a 3.5mm jack plug, so will be able to connect something in. The jack plug is behind the heater control panel (
http://forums.swedespeed.com/showthr...h-AUX-What-now)
If you want a permanently wired BT solution then your best "value" bet is probably a Parrot MKi9200 and appropriate wiring adaptors - probably about £250 to £300 professionally fitted.