This was in the MY18 brochure - 205g/km for the 204ps 4motion.
Interestingly the current brochure states 225-237g/km for the 204ps 4motion. Surely emissions haven't got worse - the current Californias are RDE2 compliant. Have the assessment criteria changed, or are VW just being more honest these days?!
I have sent the V55 off to DVLA, if it goes through ok, I will scan and place the information on the forum for future help. Its a real ball bust to be honest.