I don't believe it's X-Mode; however, it's not a binary choice between this and "economy mode" either.
"Schonmodus" is part of Subaru's SI-Drive System, e.g.:
"Der WRX ist wieder zurück. Er ist schluckfreudig wie eh und je, ausser man fährt ihn im Schonmodus I-Drive mit Katzenpfote."
http://www.testberichte.de/p/subaru-tests/impreza-modellreih...This system entails Intelligent, Sport and Sport Sharp Drive. The first option is what you asked about:
https://www.subaru.ca/WebPage.aspx?WebPageID=20070Yes, it's the setting for fuel-efficient driving. Still, I think Lancashireman has a point. You may see that if you a) ask yourself why the author did not use "Sparmodus" instead and b) take a closer look at the second part of the sentence.
The point about a) is the length of the trip in I Drive - 3 kilometers. The writer didn't write "Sparmodus" because, no offense, touting a 3 km drive in economy mode borders on the ridiculous. Regarding b), the point is that the sentence reads "wieder
normal weiter." What he or she means by "normal" is that the car reduces engine output while in I Drive, but not in S or S# Drive.
This is the part to focus on.