@Salik: Most of the functions in the screen of the mark x work WITH the navigation dvd in it (eg ac controls, maintenance log, etc). The GUI of these things is in the navigation dvd....
Mark x doesnt come with a dvd changer from factory...they're all after market...it either comes with a single cd disc player or 6 disc CD changer from factory...
To increase the frequency of fm radio, you need a simple fm kit costing around couple hundred bucks.
@volver: What you're trying to say is known as 'tpms (tire pressure monitoring system)'. Can you please post a pic of it?