Hi i have the rear screens plus dvd player all this is factory fitted,
but no TV can i add a tuner or will i need the loom also,
whats my cheapest option to add the tv

You need the tuner plus another box which I have the two spare but you will need the wiring plus the Ariels which button onto the left and right rear windows if you look on the disco site what you need and how to do it is in there in detail