Mine was reset on the 12 month service and again this week on the 24 month service. I never reset it myself. A bit annoying really as it's now not reflecting my drving patterns and style, which give a higher GOM estimate than the factory settings. Yes I know to just use current journey efficiency for range estimates for long journeys. I work on the basis of 70 kWh at 100% charge x current battery % x current efficiency, then knock a tad off as its only 68kWh usable. But the GOM is a useful quick ball park (with no mental arithmetic) once it's acclimatised to your drving patterns/ styles.