The trim looks like someone swapped the 4.6is titanium trim into the vehicle.
As for the radio cutting out, it sounds to me like the nav drive itself may have gone bad, which is the controller for the system (including the interface to the radio). You can pick up a used MkIII nav drive for well under $500 and should be good to go.
To tell if it has DSP (the upgraded sound system), the easy way is to look in the back rear compartment and if there is a unit filling that space that has 2 small sub woofers then you do have it. If not, then you don't.
I'm really surprised someone would have ordered an X5 with nav but without the automatic climate control.
If it's a great deal, make it. I think you'll be happy with it.
:xoutpost: