Dean Walker

Hi, I have a Audi A4 Avant 2.0 TDI S-Line S-Tronic on a 66 plate and I have just noticed that every time I switch it on the centre display always goes back to the average fuel consumption. When I'm driving I always have it on the digital speedo but as soon as I switch off then on again it always goes back to the fuel consumption. It never used to do this, has anyone else had this or is this standard for my car ?