I took my car in to have the 30k maintanence done. They said there was a $400 core charge on the new navigation hard drive. They installed the hard drive for free and what a difference. I had the origional dated 1999 in it and now I have a lot more map detail for my area. I'm glad I did the update because it makes the navigation system much more useable. They said this is supposed to be the last update and it had roads that were in existence up till the beginning of 2005.