That's the way you update the firmware yes, have not heard about anything new though, but it's possible there is something out there, usually these add compatibility for new phones etc. and rarely do anything great, if it all works ok, check the firmware notes to see what changes there are and if it doesn't affect you, best leave it alone.
if you bluetooth dont work you could just talk to Dacia or your dealer and ask if there is a firmware update.. much safer and would come with warranty.. messing with firmware is something i would do when the car gets older or i dont really care about the radio.
Is there a CD player available on the UK list? I really don't know. The MediaNav unit (which has USB capability for playing recordings) has a well-documented upgrade path, which includes the ability to add European mapping.
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