You have checked the fuses for the radio equipment? As Brian says, the DSP is a fairley robust unit but the fact that its not in the menu list means that the ibus (on the dsp) is not responding, this will make the system have no sounds as its wired for DSP (chicken and egg mate).

Check all the fuses that you can find and then have a look for a replacement DSP unit.

__________________
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.