Just been setting one of the map dashboard displays on my Nav6 to show the ambient temperature - on scrolling through the options I find that I can display "Engine Temperature" and "Ambient Temperature" but that there is also an option called "Temperature". If I choose that one (when attached to my RT) the display just shows horizontal bars. Ambient Temperature (the one that I want) works fine as does Engine Temperature. So does anyone know what this other "Temperature" is?