A4 Avant 115bhp 52 reg 115K on the clock on trip computer on Emc shows as 38.5! mpg I am lucky if I get 200m out of £20 diesel according to parkers it should be in the region of 48mpg. Just yesterday I had the timing belt water pump and tensioners and full service done inc doors lubricated suspension and exhaust also checked. Surely this should rise the Emc was fully checked at the VAG garage it was in and the mechanic said that it was mechanicaly one of the best cars he had worked on no problems reported via the Vagcom. So what else or should I say were the heck is my fuel going.... anyone got any ideas as to what might be causing it or is it one of those VAG mysteries where I will never find the answer?