There are 2 places that I know, 1 in Australia and one in Germany, both will reflash the nav unit, but its not cheap i suspect.

Is it a mk3 or a mk4?

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Sept 03, M3, Silver Grey. Retro-fits: Modded Mk4 DVD Drive, OEM Bluetooth, VR Control, Rainbow Speaker Upgrade, Sony SOT Amp, HK Sub, CCFL, Intravee II, NightMode.