I have an issue with the fuel consumption & running on my A4 S Line avant 2.0 TDI 140. It seems to only be able to return 34mpg. I am not heavy footed I would say 60% of my driving is town/city driving. The rest is short trips up the motorway/dual carriageway. I have previously owned a 2.0 TDI A3 and BMW 320d and both these cars were capable of mid 40 mpgs. I have also noticed that on occasions the A4 is lumpy or hesitant under light throttle around 2000 rpm. Is this a MAF issue? I have recently had the fuel filter changed and fuel cleaner run through the system. But it hasnt solved the issue. Any advice on how to improve the fuel consumption and this hesitation under light throttle would be much appreciated.