The Mercedes-Benz SL400 is a luxury grand touring coupe produced by the German automaker Mercedes-Benz from 2013 until 2020. It's a two-door, four-seater with a retractable hardtop, and it's powered by a twin-turbocharged 3.0L V6 engine that produces 329 horsepower. Inside, the SL400 has a sophisticated cabin with a high-end, leather-wrapped interior, a 7-inch touchscreen, and real-time traffic information. Other features include an all-wheel-drive system, active suspension dampening, and automatic emergency braking.