I got my Mum an A4 3.0 Quattro cab 2004 some months back, although she has been happy with it she's not happy about the fuel economy. I told her that it's a 3.0 litre Quattro & will use quite a bit of fuel but she says it's using so much more than her Merc 320 SL. She then told me how much she got from £30 which was 60 miles, this seems excessive!
I've also noticed that on start up it sounds quite load & you can smell fuel, not pure petrol but like it's running rich. She has took it into a garage & they said it was the oxygen pipes & cleaned them out? That didn't do anything so any ideas what might be wrong?