Car sold with illegal mix of tyres - what can I do?

I have discovered that my recently purchased BMW 6 Series has run flats on the rear axle, but none on the front. I am trying to persuade the BMW dealer to replace the front with a pair of run flats, what argument should I use?

Asked on 29 July 2013 by dwm

Answered by Honest John
That for the car to be on this mix of tyres is now an MoT failure, therefor he sold you a car in unroadworthy condition and is liable to make it roadworthy. Or give you your money back.
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