[Tcoat]

Stop resetting it and let it get a true average. By starting it over all the time you are skewing the average to the high end because it is counting the fast idle at start up as a higher consumption since it is cold out and it idles longer. Don't go by the live numbers at all just use the average setting. The live numbers show only what you are using at that point in time and since you are not moving there is no miles so they shoot up until you start moving again. You will see an average 1 to 1.5 L/100km increase in the winter and that is normal. Leave your average set for at least 100kms and you should see all is fine. Nothing wrong with the car you are just misinterpreting the data.