FYI. One thing about the new 2006-2 version is that it has a new feature that tells you that you are not on a digitized road and that accurate navigation cannot be maintained if you go soemwhere the computer does not recognize. I used it this week on a trip to the Grand Canyon, and the new feature popped up on some of the roads within the park. I don't know if this is all that great of a new feature though. I found it kind of distracting.

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'06 X5 4.8is, TiAg/black, cold weather pkg., comfort seats
'07 750Li, TiAg/black, sport pkg.
'05 Ford F350 silver met./slate gray, Lariat, 6.0 PSD, CC, DRW, FX4