Sounds like the permanent live feed to the boot is not wired corretly.

Has there been any work been done in there? ipod interface etc...

Also check fuse 7 and 41.

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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.