I am pretty certain that all avenues have already been explored but if this sat coder ruling offers a new one then somebody will too.
The VRT is quite clever. Its essentially a tax on the registration of a vehicle - not an import tax. It does not matter where the vehicle is purchased, the tax is the same. As such you cannot say it's unfair. That it makes cars here more expensive than say, the uk, is irrelevant. I think Denmark have a similar charge as cars there are even more expensive.