I am in the process of importing my car into Spain - it's a 1999 A6 V6 2.5tdi. The Spanish changed the law on 1 Jan and now calculate the import tax payable on the co2 emissions of the vehicle, minus an allowance for the age of the car. My car doesn't appear in their official tables - how do I find out what the co2 emissions are, in some "official" looking way, so they'll let me pay the relevant amount and import the car? Thanks!