I have been to my local dealer twice asking if my 2001 c320 can have the COMMAND system added and they continue to say no. I've read several posts on this site and many people said they think it possible. Does anyone no for sure??? I really want to add a tv/navigation system and an a/v switcher to control other units. Does the COMMAD have an a/v input on it for additional sources? <br> <br> The other system I'm looking at is the Kenwood kvt-911dvd with the navigation. Does anyone have that set up and if so h would you recommend the kenwood or the factory COMMAD? Thanks for the help.