Hi Russell, I believe it slightly depends on the engine version, but I couldn't tell which month it was for 3.0TDI. Obviously the facelift is easily recognized so why does it matter?
From memory 3.0TDI had upgraded timing chain or tensioner at some point around 2005, I'm sure someone here can confirm if this is correct?
With regards to the timer, yes but you'll need an extra pump, see this thread:
http://forum.a8parts.co.uk/showthread.php?t=9355