My "Cruise Range" did not go into negative numbers like I thinking I have read it has on other C's. When it got to "1 mile" it just stayed there for awhile. When the gas gauge started beeping at 1 segment, the Cruise Range went to 0. So I filled the tank up, got 57.5 mpg, and my cruise range is something like 367 miles. I still don't get how the Cruise Range is being calculated. Can anyone enlighten me please?