Ok, thanks for awnser man. Yeah its a modern car, pretty hard to do like anything by your own on new cars now days. I remeber my first car, a Volvo S40 (surprised?=), I changed the background lighting of the whole instrument by replaceing the small bulbs to LEDs.
With the knowlege of how to do it, i think its pretty easy, cus the price of the addon. I think it was like 150€ here i Sweden, so i think most things in the back ar prepared from the beginning to use either display, so thats why i even bothered to ask.
Well going to the dealer here i Sweden is a dead end i think. I hoped to find a guide on the net or, maybe find someone that have it.