Well, they would not admit anything, but offered me half of my payments in return. Since the amount isn't big enough to involve the legal system I have accepted this offer. However I can't understand how a BMW dealer can be stupid enough to kill his customers relations by being so cheap. Over the long run it's guaranteed that they are the ones loosing money.
I need a dealer I can trust, and luckily even here in Northern Norway there are plenty options. :-)