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Originally Posted by KiwiJochen
Cycle through the FM modes:
FM1, FM2, FMA = Business RDS
FM, FMD = Professional RDS
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I've just double checked and my radio is "FM1,FM2,FMA", thus a single tuner, but I do have the professional navigation system with the screen on top. X3 2006.
Here in Germany, and as far as I know, the new radio with dual tunners was only available since the revamped 2007 X3. But I think I read something different in this forum for the USA models (meaning dual-tuners for pre-2007 X3's).