When the C-Class predecessor launched, it was known as the 190 and carried a four-cylinder powerplant underhood. Mercedes is now considering a return to four-pots in the U.S. market as the price of fuel continues to soar. MBZ is reportedly already testing a 1.4-liter carrying a supercharger, which is strange when you consider there's already a 1.8-liter blown four-cylinder on sale in Europe. The C180 Kompressor seems like it'd be the easy way to get fours back into the U.S. lineup, but Mercedes must have some other ideas driving the decision to develop the smaller 1.4.