Just an update on the Blue Optimized tune and the fuel economy that one can get from it.
I do very short trips and my 4motion is loaded to the max. with the tools, oils and parts.

Well, the first 1/2 the tank I got straight 10L/100km (500km to the 1/2 on the fuel gauge); I enjoyed probably too much that low down torque and the slight power increase which feels great and it was kind of hard to resist.
Not driving to get the best possible fuel economy caused that I got 10L/100km which, is only 1/4L or so better than my normal winter fuel economy. Though the tank was filled up at the truck place with the hi-flow nozzle and I think that I would put more fuel in the tank at the place where I usually buy my fuel.

The second fill up and the half the tank later, I have to say I'm impressed, I've got 8.7L/100km. This time I was driving for the fuel economy, and I'm sure I could get even better on my second tank.

Also much less soot from the tail pipe, which means, cleaner van at the back.