Jochen, I've also been chipping in help (on another forum) and like you was surprised that the cd player could be causing the problem (never heard of it before), like you I also suggested that the i-bus may be being overloaded *somehow*, how, would be a mystery?

I think on the mini the cd player and the dvd nav drive are 2 separate units but they are piggy backed togeather via thier chassis, so you could be right, it could be a power related issue...

Simple answer is not to play cds, but thats not really a fix.

P.S, any news with regard to the navcoders IV interface my friend?

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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.