I get about 32mpg per tank according to trip 2 which I always re-set when I fill up, which is meaning about 360-370 out of a tank of 98-99. Round town it varies from 25-29 mpg generally always in D, but with climate, heated seats, and I guess the xenons will suck up a little more juice as well.
But I will say ive only had the car 2 months, so I am still enjoying pressing the happy pedal, every time the engines warmed up
One thing I have noticed is that I put Shell V power in the last 2 tanks and at 80 the computer shows a 2-3mpg improvement or tesco 99 needle at 78-79 on cruise in D mode, not sure if this is the sign of a better fuel, or just change in atmospheric conditions?