Hello sorry for English,
I also had my car tuned around three months ago, initally the consumption was pretty much identical..9-9.6L per 100, the performance was of course better.
Changing my fuel to the "more miles" (statoil) diesel mad a huge difference now avg between 7.5 - 8.1..whether this is only fuel related, or a combination of the mapping and fuel i cannot say, but still 8L per 100 combined is great for me considering its such a big car with auto and 4wd.
Overall very happy with the choice to remap, car is much more usable with an extra 30kw.