2016 Mercedes-Benz E-Class Sedan Diesel is the newer version with some differences, such as the model year, horsepower, and fuel economy.. First of all, the 2013 E-Class Sedan Diesel has a more powerful engine and gets 6.5 mpg less than the 2016 E-Class Sedan Diesel. Among similarities are the body structure, powertrain, market segment, starting price, ground shadow size, height, and maximum occupancy.