Well from what I understand Clear Channe in the US has started broadcasting TMC (Traffic Message Channel) data in select markets. I own a 2000 X5 which came with mk2 and 4X3 screen. I just "finished" upgraing the nav screen and have an MK4 on the way to me in the mail. I just downloaded the most current NAV DVD.

So now the big question is which NAV OS should I run to get TMC, and will I need to upgrade the board monitor radio to be able to recieve the tmc data? Right now it is just the version that came in a X5 with an 03/2000 build date.

Any help/info is appreciated!