My 71-year-old mother drives a six-month-old Suzuki Grand Vitara manual diesel and recently the clutch started slipping, so she took it back to the dealer. They diagnosed it completely burned out and refused to repair it under warranty, as they blamed it on driver error after carrying out tests. I am very surprised that this has occurred if they are right, as I have been a passenger with my mother on a number of occasions and she does not ride the clutch unduly and I cant see any aspect of her driving style that should have burnt out a whole clutch in six months (3000 miles). Is there anything she can do to try and get the new clutch covered under the new car's three-year warranty?