Hi everyone. My indication on the dash has gone haywire. It has sat around 4.5 to 5.0 miles per kw for a couple of years indicating an approx range of 220 miles. Today, all of a sudden it has jumped anything between 99 and zero. Currently when I switched it off it was showing 8.9. So that works out at over 450 miles. Also, within a mile the indicated range dropped from 184 to 161 . Anyone got any ideas. The car is still under warranty.