Am I brain dead or is this sysetm complicated?????? Word has it you can voice command a/c system but I can't find anything on it. I have a call into dealer on this. No response as yet. Also, RX forum verifies no secret code to overide Nav system in 2007 vehciles, while vehicle is moving. Maybe there are a whole bunch of voice commands that will make changes w/o manually changing the screen. Any thoughts from you long time gurus? I beleive it is what it is. On the plus side, it is a great ride and for full time 4wd the mileage is acceptable in comparison to other vehicles (19-20 on highway, 65-75 mph) using old fashioned, brain dead math. Don't trust the computer mileage.....it ain't right.