i own a 3.0sd with 11.000km
I just returned from a ski trip
During this trip, 1900km of highway driving and just 70km of mountains, i was at 14,2l/100km
I have 20", adaptive drive, active steering and... a very heavy right foot!
I presume that this relative high consumption is due to the heavy speeding on the highway (nearly never under 160km/h and peaks up to 210km/h)
And by the way this is truly a fantastic car!