OK, I just bought a 2006 X5. LOVE IT! I got to the "setting" screen and in the upper right I have the following; 4-1/71 so my question(s) are;
1. Which Nav system do I have
2. Is there a new Operating System I should be installing

My Nav disk is; 2009.1.65 90 2 147 669

New to this so any advice is appreciated.
ken