Welcome to the forum,

I've never heard of this type of fault (or the fix, holding the eject button!).

However, It does sound like the mk4 has a fault, either ROM or memory or even the loading mechanism, there is a place in Germany that will attempt to repair it.

I would be tempted to get a replacement off ebay though and selling yours as faulty.

__________________
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.