Why do people always beleive things can be cured with a download?
TMC is a FM (this is a radio frequency band) data service. That means, the TMC is a commercial entity which has to be licensed (read: bought) by the radio stationss.
Consequnetly, the license to decode the messages has also to be bought through a license.
Citroen and Peugot have never obtained a license to decode the TMC messages from TrafficNav. Hence, no TMC with PSAs cars in Poland, Slovenia, SLovakia and Ireland, among others.
Reason: Royalities are high, yet sales are low is the repective countries.
More Info: Citroen hotline, that's where I got i from.