What did the garage do then.
I'm sure you can get the mileage adjusted. Just google Jaguar XK8 mileage correction and find someone local who can do it.Hi all and thanks again for the input. The car has been with E&E in Milton Keynes. Very helpful and knowledgeable. I managed to get a repeat of the fault, but it cleared itself again, so left it in the workshop. After about a week they managed to get the fault up again and diagnosed it as a faulty instrument pack (speedo etc). They have fitted a secondhand unit which seems to have cured the problem. Only trouble is the mileage is now 135000 whereas the car is on about 78000. The garage has fully documented the change (in the service book and on the bill).
Does anyone know if it's possible to get the mileage adjusted?