Mini Countryman 2015 Problems

What he bought is in effect a used car, not a new one, so it might vary from the specifications of a new car. In this case it seems that for some reason the run-flat tyres have been switched for regular tyres. I might speculate that as it was a demo vehicle the salespeople demonstrating it might have wanted a softer ride to impress potential buyers than the ride it would have if it were on the run-flats. But that’s me being cynical. Your son should go back to the dealer personally and talk to them face-to-face about his issue and request that they either replace the damaged tyre and provide him with a spare, or fit run-flat tyres as he believes it would have had. The alternative is to carry a can of pump-up foam in the car, which would get him out of trouble in the case of a puncture.