@ enigma you seem to be saying the 1.6L Merc does not exist,so let me bring you up to speed - read up on BLUE technology.
Blue is the new Green technology for the auto industry where aerodynamics,fuel consumption,roll resistance,weight etc are improved without compromising the cars power/outputwith the following benefits:
Energy savings
Less CO2 emission
Savings on tax/insurance etc
Some of the manufuctureres who have adopted it are Peugeot - Blue Lion,
VW - Blue Motion for (Where the Passat @sheep describes below falls) and Mercedes - BlueEFFICIENCY where the 1.6L (1597cc) C180 falls and was first launched at the 2008 Geneva Motorshow
'If you are not living on the edge,you are taking up too much space'
"We do not inherit the earth from our ancestors, we borrow it from our children" Native American Proverb