Hey Gretchen,
You have to check the car out yourself. I have a 2007 400h which is your same care but hybrid. My nav system stinks. It certainly does not do what you are dreaming of. I wish. It barely recognizes the simple voice commands, but in no instance can you speak a street address. The nav system in my car is the worst I have ever had, and the dealer admited to me that it was not the most user friendly. Hope this helps.