Guys, looking for advice here,my car returns roughly 500 miles to an Â£80 tank of diesel, its a non Quattro. Now the display2 shows an average of 35.9 mpg ive worked it out at 33.8 mpg. It heats up fine to 90 Deg C and stays there, heating is fine and no problems on the coolant side that i know of. Worth changing the MAF i can have a new Bosch one for 83.74 + vat. Its had new air & diesel filters and an oil change recently which didnt change anything. Thanks in Advance.