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Originally Posted by HBMW
It will accept my old CD form the MK3 unit but the DVD doesn't work. DO I need a specific DVD (Australian) for the MK4 computer or is it possible I have corrupt firmware preventing me playing V14?
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The firmware won't be corrupt, but it would help if you told us what firmware version you installed.
Most likely the problem is exactly what the nav says: the map DVD is not made for your nav
BMW have different format map discs for different generation nav systems, your map DVD probably is the version for the E90/E60 etc, with the newer nav system
Tip: Australia doesn't need to be stored on a DVD, the map size is only around 150MB, so it fits on a CD easily.