Right this could take some time.I've got the twin tuner but have tried to staying on Classic FM which is TMC enabled.I have tried various cd having the tmc function on them.TMC shows up red all the time.I go to menu when on tuner try to select TMC (showing off) and it goes to a screen to select radio station.I select Classic FM but still off even during navigation.PLease help as this driving me nuts.Thankyou and Merry Christmas