I have just completed a retro fit of a sat nav. It is not a plug in play unless you already have the sat nav fitted thats just because you need the wiring loom, plugs or of course make your own.
I hard wired the cables into the screen and DVD player, and then connected these to the (IP65) existing harness which connects to the standard radio.
I had the digital temp control the additional parts I needed were the obvious screen and DVD player also the RCCM unit which is for the plugs from the Digital temp display oh and of course the aerial.
I have been told the "S Type" already has the harness in place for an upgrade but all I can say is I couls not find anything close to the plugs needed So I spent 3 months getting the details right and Yes Yipee I have done it.
If you dont want to solder then just forget it.
Let me know if you need some more help
By the way the sat nav screen also will give instructions to your message display
Everything is harmless just try and see is my motto
Cheersmatics.pdElectronics_Sat_Nav_Harness_Schematics.pdfElectronics_Sat_Nav_Harness_Schematics.pdfElectronics_Sat_Nav_Harness_Schematics.pdfElectronics_Sat_Nav_Harness_SchematicElectronics_Sat_Nav_Harness_Schematics.pdfs.pdfElectronics_Sat_Nav_Harness_Schematics.pdff
