Is the trip computer the same as the Multipla one? Mine reset itself (tripA=tripB=0) a few miles ago at approx the miles equivalent of 5000km. Though working back from when I noticed it I thought it probably happened when the car was started, so guessed it was just some odd electrical spike or dodgy connection. Total odometer reading not affected though. Does the Alfa one have distance til next service, was that reset as well?