Please check out pictures on the left, the car in question.
Please find below the original description added from the owner of that car:
“Cafe Millenium saves 12% fuel with the VW Golf VI
With my VW Golf, year BJ 6/2011, I drive about 20,000 km per year and had an average fuel consumption of 6.5 liters per 100km. Since the installation of the stick, the consumption has decreased by 12% to 5.7 liters, now over long distances I drive with 5.3 liter (previously 5.8 liters). I can not report a comparison of emission values, it was not yet a Pickerl certificate necessary. (2014)
Beate Cerny”