If so was curious what interface system they used?
I would like to try doing it myself but unsure which product I should use.
I found one from NavTool but it doesnt seem very clear.

 

This is something I am currently looking into doing on my 2001 XKR (same principle applies to the S-type). You need something like this:

http://www.nav.tv/category/7/68/128



To connect this up, you have to cut some of the wires behind the nav screen and wire this device in - you then connect your reversing camera to this device.

I am guessing you can also fit this in the boot (trunk) of the car.

Installation instructions here:

http://www.nav.tv/files/navtv-technical/NAV-INJAG..pdf

A bonus is you can then connect other video devices (like a DVD player) up to your sat nav screen.

 

It is much easier to install the NavTv unit in the trunk.

 

Does this mean you have actually done this on your car? Got any details/photos of the install? I am especially interested in where you mounted the camera and how you routed the wires, so any info would be appreciated.

 

i have a NavTV I can sell at a good price to anyone looking to implement this for backup camera and/or TV.

 

Pretty straight-forward doing the RGB in the center console... run the camera lead there, you can also do a front camera to protect the nose!