temp sensor replaced,maf going get replaced tomorrow,anything else why my A4 TDI 130 is giving me 24.6 m.p.g (town driving) injector reading (on idle) -0.75 -0.42 0.66 0.52 mg/str been told these are very good. No black smoke or leaks,plenty of power good on a run ,local driving....very thirsty!! NEW FILTERS FITTED. Could maf be faulty giving a wrong reading? or anything else i can check?