I reset my TCD by holding down both buttons for 2 seconds then releasing. This resets not only the trip but also ride time, max speed, and everything else, with the exception of the total mileage (odometer). The odometer figure comes from the motor electronics. I had the motor changed on my Creo and my mileage started over. I doubt the dealer can reset the odometer, much like a car odometer can not be reset.