My sat nav map always shows with North to the top of the map but I want the heading to be at the top. I can change it through the menu, but it always reverts to North the next time I use the car. There doesn't seem to be any way of making this setting permanent. Previous cars I have had with built in sat navs (Nissans and Mercs) have the option to switch between the two and the choice remains until it is manually changed back again. Is this just a poor design or is there a hidden setting?