Hi all, I just got a 2016 a6 se executive expecting to get decent mpg. The car has had a full service history but the average mpg is 28.6 to 34.9 the higher is on a motorway. I bought a diagnostic machine (carpal) and it's brought up no engine faults. 18 gms of soot which audi says is normal, the only thing it did is the faults you see in the pics, so is this cause the car is a bit older or is there something else I can check.