My Grande Espace's display reads 99.9 on MPG. I believe that every now and then it displays a sensible figure ( either that or im going barmy).The other displays do give a figure but they are totaly unrealistic as well ( 1700 miles before empty!). Ive only got 3/9th of a tank left ( why 9 bars and not 10?) and it tells me that i can go 700 miles. Can any one give me advice?