Unchanged for 2013, the Mercedes-Benz CL-Class is a luxury coupe available in CL550, CL600, CL63 AMG, and CL65 AMG trim levels. The CL550 (4MATIC AWD) is powered by a 4.6-liter twin-turbo V8 engine (produces 429 hp/516 lb-ft of torque) paired with a 7-speed automatic transmission. The CL600 (RWD) increases performance with a 5.5-liter twin-turbo V12 engine (510 hp/612 lb-ft of torque) paired with a 5-speed automatic transmission. AMG trim levels up performance with a 5.5-liter bi-turbo V8 that produces 536 hp for the CL63 and a 6.0-liter bi-turbo V12 producing 621 hp for the CL65. Both have RWD configurations, but the CL63 is equipped with a 7-speed automatic transmission while the CL65 has a 5-speed automatic transmission. Fuel mileage falls within an EPA estimated range of 12 mpg city to 24 mpg highway, depending on model selection. Features include night view assist, navigation, and 20-inch alloy wheels. Safety is comprised of blind-spot assist, 11-way airbag protection, active lane-keeping assist, Active Body Control, and Electronic Stability Program. The CL-Class is backed by a 4-year/50,000-mile warranty.