I recently purchased an 11,000 mile 2007/57 Mercedes CL63 AMG from a private seller. After taking it to the main dealer for a service and reporting a judder under braking, I was told that due to pitting of the brake discs I would need to replace all four at a cost of £3,500 + new pads I have asked them to look at this as a warranty claim but they put it down to driving style. Obviously I can’t comment on the driving style of the previous owner but just needed some independent advice on what would cause pitting of this nature. I did point out to the Senior Customer Service representative at MB Maastricht that the sales literature relating to this car claims this vehicle would be ”at home on a race track” and it was clearly never meant to be driven like ‘Miss Daisy’ on a Sunday afternoon but that seemed to fall on deaf ears. I have searched the net on this subject and it seems debatable whether the pitting is caused by hard driving style or by lack of use?