The DIS showed only 5 mile range left so went to tesco to fill up. Now before with my A4, when the range got to zero I would fill up to the brim and find that there was still about 4 litres left in the tank. With my A3 I got 51.5 litres in before it auto shut off and then squeezed another half litre in. 52 litres in a 50 litre tank ??? Did I actually have any reserve or are Tescos diddling us on measurement ?