Among the models, Mercedes-Benz showed a hybrid version of the E-class, the 2014 E400 Hybrid. It uses the same system as the S400 Hybrid, a direct-injection 3.5-liter V-6 coupled to an electric motor. The engine produces 302 horsepower and 273 pound-feet of torque, while the electric motor adds its own 27 horsepower and 184 pound-feet of torque. Don't expect spectacular fuel economy. Although Mercedes-Benz did not announce numbers for the E400 Hybrid, the S400 Hybrid only gets 19 mpg city and 25 mpg highway.