You will probably have the PRO nav system and the latest here in Europe is the 2010-1 PRO disc, not sure about the states (2009-1) I think.

OS updates are done through the dealers only and are not "home" upgradeable.

As for what version I have no idea, sorry.

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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.