confirmed thats the case - its to stop people circumventing danish car taxes by importing cars from the rest of the EU....from memory i think its about 55-65% of the cost of the used car in denmark - as used cars go for serious bucks in dk, you'll pay way more than the car is worth, most folks seemed to reckon around 200% of the value of the car to import into dk.
I think you'll also need to return the car to standard manufacturers spec
for reference the 5 series beamer i had while i was out there was €96k (company paid not me) when at the time £25k would have bought it for you in the u.k.
Just to add insult to injury, if you don't complete it all within two weeks of residence, they nick you.......
my advice if you want to move a brabus to denmark and you're copenhagen way - move to malmo (in sweden) and travel over the bridge each day.
of course - popping over for smart times is ok...