Audio

[Triniboy]

Hi

I have just purchased a 2006 X5 3.0d it has no navigation so it is just fitted with the radio and the changer fitted behind the wood facia above the radio, my question is how easy is it to upgrade the audio system to the later versions with the large screen although I know the navigation would not work in Trinidad but it looks better with the large screen and I would assume I would have more options, also can I upgrade the computer so that I can get the read outs on the same screen, let me know if all this is possible and would it be expensive.

Thanks
Triniboy