bring it uptodate? in what way???

Well, a couple of suggestions,

Upgrade the nav computer to a mk4 (if you have the mk3).
Get the latest software for the nav unit will help, (v29).
Get the 16x9 monitor.

Bluetooth does not form part of the navigation system and must be installed separatly, (US cars and have the BT looms pre-installed on 2002) so if you want to retrofit BT you need a BT ULF, a mic, the BT antenna and the pair button (you can aslo get the eject box, but this is not needed to get the BT option to work), if you are unlucky enough to have a car with no BT pre-installed you will also need the retrofit BT loom.

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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.