Long story cut short, Im looking to reject a new car as it keeps going into limp mode and the dealer is unable to repair. The car cost £67k and I paid £5k of the deposit on a Barclaycard. The dealer is rejecting the rejection as they cant find a fault although they know there is a problem (diagnostics have thrown up faulty pressure sensor, ESP control until and compression in cylinder 5 problems but all appear to be red herrings). Anyway without lectures for spending £67k on a car, do I have grounds for a section 75 or 75a claim up to the max value of each? The balance is on a MB PCP.