The wolf has a donaldson air filter fitted in place of the standard 300tdi air filter. It's a nice wee size but you'll need to fabricate brackets. The oil filter is also for a 300tdi but if you have a 200tdi then it'll fit
Ah I just reread your original post. No the actual air filter element from the donaldson air filter won't fit 200tdi unless you change the whole lot for a donaldson (theyre far superior anyhow)
I always thought it was September 1990 that Tdi came in, and most TDs that I see are Gplate and before.
But some have told me there are H reggers about with TD, claiming there was an overlap of the two And I am not certain they are wrong.
OP, if you could post a pic of your engine this could be cleared up in seconds!