Two Sedans with more similarities, such as the body structure, market segment, ground shadow size, height, and maximum occupancy, than differences, like the starting price, horsepower, and fuel economy. First of all, the 2016 Audi A6 is priced $6,100 lower compared to the base MSRP of the 2015 Mercedes-Benz E-Class Sedan. And finally, the 2015 E-Class Sedan has a more powerful engine than the 2016 A6, and it gets 2.6 fewer miles on a gallon of fuel. Among similarities are the body structure, market segment, ground shadow size, height, and maximum occupancy.