I just posted a long winded post but this stupid website logged me out while I was doing it and then deleted what i wrote, and i can't be bothered to redo it so I'll just summarise:
Cantfixwontfix what you say about the ebay stuff now showing on multiple ones like hatchback and estate - it definitely wasnt doing that when i posted this, it only showed on saloon. So now it is showing on others i think that does confirm its a bug in their database or something.
Secondly i looked at haynes website for the two workshop manuals for the mk3 (2000 - 2003 and 2003 - 2007), the prefacelift book shows it covers engines "and 2.5 litre (2495/2499/2544cc) V6" and the facelift book says it covers "Ford Mondeo 2.5L (2455cc) (2003 - 2007) Ford Mondeo 2.5L (2499cc) (2003 - 2007) Ford Mondeo 2.5L (2544cc) (2003 - 2007)". So even they havent got a clue.
I think unless someone who actually knows for definite whats going on comes here and puts the issue to rest i'll just chalk this one up to a good old fashioned cock up in the flow of information.