We have an M2 two years old and when we apply the brakes the noise is horrific. (Hot or cold) many people including strangers have commented, it’s embarrassing. BMW have looked at it, adjusted the brakes, shaved some off etc, charged me £90 to clean them, then refunded £90 and said there is nothing more they can do. I wrote to the chief executive for BMW and was told basically if the engineer thinks there fine, there is nothing he can do. No wonder BMW service is poor if that’s what’s driven from the top. It’s purely down to costs as our garage man is going to repair it. What a waste of time there warranty is, although it has done me a favour as I was going to buy a new car from one of their showrooms.