Hi Andy, what is the flex plate? Also do you now of any schematics/diagrams of the 300tdiauto engine gearbox assembly?
I noticed on the auto box i have got from ebay that there is a inductive sensor on the bell housing and a plate with four metal pins that goes on the flywheel, thought these may be for the engine speed on the later ecu driven 300tdi (mine is an early 300).