First week of March take M3 in with 28000 miles on clock advise I can hear scraping on breaks. No warning lights. They test drive and do visual inspection nothing to worry about. 500 miles later problem still exists no warning lights take it back. They do full brake inspection tell me discs scored pads down to metal. Can't understand why didn't do this originally .....now costing me further 500 quid for discs and pads. To cap,it all fitted discs yesterdAy still a problem they say discs faulty so re ordered . Simply do not know whether to trust them anymore. Had previous engine problem which resulted in complete engine rebuild at a cost of 2500 to me balance of 20k paid by BMW UK