Do a search on google for mileage correction companies and it will bring up loads. Not sure on the legality of this, but as I understand it, as long as you are not falsifying the mileage to something it is not its fine. I got a quote on the other halfs 306 when the digital readout went. The dealer couldnt do it (new cars have a back up now apparently where the original mileage is stored), so i enquired to one of these companies and they quoted me ?100......no chance. I got the dealer to give me proper certificate so no worries when selling,