I was at the stealers today to fix a defective door mirror (motor kaput). Before arriving I carried out a diagnostic check with my Ross-Tec cable and printed the results before deleting all errors, hoping to clear the fault. On arrival I presented the print out to the service manager who went off on one saying that I had invalidated my warranty by deleting the errors which they needed to send to Seat UK to prove there was a fault in the first place. As anybody come across this problem?