What is the rationale of the Main button? We all know it toggles the car in and out of cruise and limit modes, but why? Why not have the Set/-, Res/+, Cancel and Lim buttons active all the time? Having to activate automatic speed control with the Main button seems an unnecessary faff to me. I leave mine activated all the time. Glad it stays in mode and you don't have to activate it every journey. Also, why is it labelled Main on the Jazz when on the Fit it is labelled more appropriately Cruise?