Soooo.... tested the engine bay fuse for OBD2, ECU and no power getting to the fuses? However, each time I removed and replaced the OBD2 fuse my Icarsoft tool would boot up in the car but still shows a linking error? There seems an absence of power getting to the priority fuses in the engine bay and no command feed to the fuel pump relay... it has 12v and can be jumped.... in-tank pump is working OK but still no glowplugs light or orange engine management light? Datatek is very kindly posting out a workshop DVD with wiring diagrams. I have disconnected and cleaned the circular engine bay wiring loom connection. It looked nice and clean, however the white multiblock which sits in the driver's footwell was looking corroded.... cleaned it up but not sure if it has any significance to "non start" issue or it just supplies ancillaries such as lights etc..?