Evesham in the UK ?
I had problems with my unit, ended up just cutting the rear wires for my issues,
The head unit is built into the CD 6 changer. And the amp ( unlike the Bose system )
http://www.thenissanpath.com/viewtopic. ... highlight=
See my link here where the unit is.
The heads are like rocking horse poo, about £200 on Ebay.
The screen is just that, a screen.
Be gentle pulling the main fascia off, the 'seat belt & hazard' switches are brittle and i pulled mine off, had to glue the back in place.
Head comes out with 4 screws.
There is also a FM ariel 'amp' somewhere in the rear headline.....
Hope some of this helps