I've got an 08 Cayenne with nav. Decent nav system, but I noticed that it doesn't know the street destinations about 10 percent of the time. These addresses aren't exactly new either.

How can you tell which version you have? I would think in an 08, it would have had the latest greatest installed...

My wife was at a mall the other day and it showed it as an empty field. That's not acceptable. I've had it let me down a couple times as well. It even shows my house approximately 5 houses away.