Sorry mate, I thought you said 81 (not 31), you will need a mode2/form1 for you nav computer.

I'll dig the link up for you.

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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.