I've just got a BMW 318i which I love to bits, but unfortunately have a minor issue with the mileage on it.
The dash on the car has been changed twice, so the miles showing on the display are wrong (I knew this before I bought the car and bought on a worst case mileage).
Unfortunately, the exact dates and mileages of these changes were not recorded. I've a rough idea / can work it out from the MOT history, but I'd love to be able to correct so the miles are exact. Currently, The dash is about 30k short of the real miles.
I've heard there is *something* in the car that records the true mileage regardless of what the dash says and it cannot be changed. Is this true and if so, can I access this or do I need to go see BMW?
Thanks for any help / pointers!!