Competing in the midsize sedan segment, the 2018 Mercedes Benz CLS 63 S AMG Sedan is a direct competitor to the Audi RS7, the BMW M5, and the Porsche Panamera Turbo S. The CLS 63 S AMG starts off at an MSRP of $108,900. Each trim is offered with a 5.5L turbocharged V8 engine and a 7-speed automatic transmission, producing 577 horsepower and 590 lb-ft of torque. Through this powertrain, the CLS 63 S AMG manages a 0-60 of 4.7 seconds and a combined fuel economy of 18 MPG.