Ok, I spoke with Audi's engineer and what he said was crazy but it worked. He said that the 'efficiency' setting does not work with my driving pattern and that I should switch it to 'Auto'. I did this and i'm now getting those high mpg again.
It works so I am happy but it's a bit misleading. People who don't know this and are thinking they are doing the best thing by using 'efficiency' mode are losing 10mpg, on a 60ltr tank is 150miles less.