I just installed my 6140 with the help of a friend, and am still learning, this thread has been great. I have figured most of it out, but still having some trouble figuring the hands free out, it does not tell me when my phone is connected and does not always auto connect (IPHONE). I have also found out quite by accident how to play music via bluetooth, what I have noticed with that is it tends to cut out alot, has anyone experienced this. It is like I am losing the signal for a second. I also discovered the wire for the brake switch to disable DVD is nothing more than a ground, if you just hook it to a ground it works. OK I know i am rambling, but there is alot to learn. Have I understood correctly that this thing responds to voice commands and give voice responses, i.e. in NAV mode??? and last does Kenwood periodicly update the software on these units, if so...how?