You are stil missing one thing, TMC has to be on the Navteq maps as well, so al other broadcasting, BM that supports it for US want do you any good unless navteq does its part as well

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X5 4,4i-06 Current
330Ci Cab-03 2007-2008
MB E55 AMG-03 2006-2007
Z3 2,8 Roadster-98 2006-2007
X3 2,0d-05 2005-2006
320d-99 1999-2005