Two Sedans with more similarities, such as the body structure, market segment, ground shadow size, height, and maximum occupancy, than differences, like the model year, starting price, horsepower, and fuel economy. First of all, there is a $6,450 difference in the base MSRP. The 2016 Mercedes-Benz C-Class, a newer vehicle by three model years, has a higher starting price than the 2013 Audi A4. And finally, the 2016 C-Class has a more powerful engine than the 2013 A4, but it gets 2.5 more miles on a gallon of fuel. Among similarities are the body structure, market segment, ground shadow size, height, and maximum occupancy.