from memory 17mm or 19mm spanner for injector pipe
as long as its the tddi engine crack open each injector one by one whilst cranking, fuel will bubble and then dribbnle out once the air is out the line, tighten and do the next one.
if all else fails, make sure you have a decent amount of fuel in the tank, and the fuel filter is full and give it a few brief sniffs of carb cleaner down the inlet pipe