Well,
If I knew any such, of course I'd use the minister card -
<start evil rant>
...but ask him to explain to you why he needs the money - they are the idiots who implement these leeching taxes to screw the common people out of their money in the first place. He and his ilk are the reason I'm looking for a way to leave this tax paradise where people who know them can get corrupt favors while they only sit and get rich and I struggle to keep a 1987 car on the road and they still want tax on it. They just sit in their big Mercedes and laugh at us common people who struggle to keep a positive balance on the bank account, and give money to cat-killers in Kiasma, they raise the taxes and then raise their own salaries, and they need a new Mercedes so they save a bit and close the mental hospitals and old folks homes, problems solved...
<end evil rant>
- what, animosity towards politicians... never!
The Customs is notorious of having different opinions even at different stations, so you definitely need to make an appeal, and then take it to appeals court and maybe in 10 years they might make a decision. Now if the car is from outside the EU it might be somewhat difficult as from within the EU the 6 months time has been contested but I am not sure from outside. So appeal. They have a backlog so it might take time. There is an option to go higher and higher, but every round takes time, and logging a complaint costs. As Arno said, its the date of purchase; but I think they look at the time as "on the road" - remember the motorcycles, winter and the 2 year rule?
Hopefully you have a lawyer in the family too - battling with Customs is an ordeal I want to avoid, been there, done that, paid 2 grand tax for a car worth 1 000...