Hello, I observe with me that the average consumption indicator shows about 5 – 12 % less than I actually calculate when refueling. I have already read from Mazda 5 and Auris that there is a possibility there to set a deviation in percent, which should always be taken into account, so that if you then have enough data about your own car (e.g. after 5 – 10 tank fillings), then we can say that always 10% should be added to it. h goes at Corolla Verso? I bought the car built in 2008, actually 2009, probably built in December 2008. MfG cvontour