The Mercedes-Benz S 350d is a luxury sedan featuring a 2.9-liter 6-cylinder turbocharged diesel engine with an automatic transmission, producing up to 2987 cc , 255bhp and 620 Nm of torque. It has a top speed of 250 km/h, can accelerate from 0-100 km/h in 6.4 seconds, and offers features like AWD and a 9-speed automatic transmission.