Two Sedans with some similarities, but otherwise different in most aspects such as the model year, powertrain, horsepower, starting price, fuel economy, and maximum occupancy. First of all, the 2016 Cadillac CTS is priced $6,640 lower compared to the base MSRP of the 2013 Mercedes-Benz E-Class Sedan Diesel, which is older by three model years. Also, the 2016 CTS has bigger and thirstier engine; the 2013 E-Class Sedan Diesel gets 1.4 more mpg. In addition, the E-Class Sedan Diesel seats two more passengers than the CTS. Among similarities are the body structure, market segment, ground shadow size, and height.