Drove my dads E92 335i to South Coast shelly beach, I am used to always getting there on one tank of fuel in all the cars I have driven there in....Not the 335 lol...I would say the consumption is pretty shit to be honest, at the same time though it is an auto and they do tend to drink compared to the manual.
My 330d when it was auto used to average in town 8.5 - 11/100 depending on how I drove, that reading is pretty inaccurate though as its quite easy to fool it, however I would get roughly 550 - 680km per full tank.
Once I converted it to a manual the reading it gave me was 4.5 - 6.5l/100 in town driving and just under 900km to a full tank and I think I got over 900km to a full tank once. So that just goes to show how much lighter a manual is over the auto.....we are talking old style automatics though, however the older E92 335i still used the older style auto boxes so the consumption is still pretty shit to say the least.