We've had the MIB3 infotainment updated - hugely better in terms of reboots, and no random SOS calls. But on the Sat Nav a new feature has appeared which we noticed on a trip through France. Some of the time an a area round our route (which changes, and isn't always parallel to our route ) is highlighted - as the pictures show. Anyone knows what this is or what it means please - not in our manual anyway, and it didn't do it before so I suspect it's new. 

That shows the distance that you can travel until you are out of charge and possibly petrol as well, although I'm not sure about the petrol.

Thanks...sort of makes sense. But it's wierd...it means we can travel further in one directiin than the other? (top picture).