Very good information, I used this before. If you know your rights, then you're well armed. I always think the best way is be polite with the dealer. They didn't mean to sell you a duff car, they dont want to lose you as a (potential) long term customer, they don't want a bad reputation. It seems that, when push comes to shove, most MINI dealers are pretty decent. It's supposed to be a premium brand (go to any international MINI press event and that's well rammed down your throat), so below par cars is not acceptable.