I wouldn't bother with the standard Ford unit to be honest mate. I have the touch screen satnav, CD, Bluetooth unit (with out dvd) in mine and its a pile of shite mate! The sat nav is really crap. The only good thing is the touch screen buttons and bluetooth.
It was fitted when i bought it but it was a £1000 optional extra at point of sale.

Far better off with an after market unit.