It does not have two tuners, TMC is enabled and is an official feature, handbook enclosed with car but does not seem to work. Apparently the Z4 has a single tuner as well (according to dealer) but TMC does work in this. My dealer is contacting BMW!
I thought the twin tuner meant you could listen to another radio station whilst the TMC "listens" to the TMC channel (in UK Classic FM)-is this correct?
Manual states "when the radio is switched on , it automatically switches to the best reception station with TMC traffic information"
Call up "menu"
Select GPS navigation
Select RDS-TMC"
......etc
CD model is "Radio Business CD, model no. VD1010"-is this any help?