First, let me say hi to all. This is my first post and I am a new member. I have always been a "Mercedes" person and just brought my first BMW about two weeks ago. I picked up a 2006 X5 4.8iS with about 30,000 miles. I transferred the existing warranty and had my first dealer visit at Pace BMW in Portchester NY. The experience has been pleasurable so far and I luv the car.

Now, here is my first question after several days and hours of reading. I wanted to see what version of my nav DVD i had and when I ejected the disk, I realized that I had a copied nav disk (verbatim disk with no writing) after searching, I came to realize that it is possible to customize the splash screen and update the firmware. So, gor a 2006 X5 4.8is (production date is Oct of 2005), what hardware nav do I have (MKIV I hope)? What is the newest nav DVD available and is there a step-by-step to tell me how to update firmware for my system (what types of disk to use for firmware and nav DVD + or - disks?

Sorry for the n00b questions but I have a headache from all the posts that I have read with no solid answer for my specific veh.

Thanks to all.

P.S. Will changing the firmware affect my factory bluetooth set up?