At a glance, the 1972 300 SEL shows itself to be a composed, beautifully appointed luxury saloon. Under the hood, however, is the biggest quad-cam V8 Mercedes built. It could push the car to a top speed of 137 mph. In utter comfort, mind you. It was, in fact, the fastest sedan in the world in 1972 and did 0-60 in 6.5 seconds. Its air-ride suspension was self-leveling based on the load. AMG was just a small local tuning company back then. They produced special competitive versions of the 300 SEL and had an impressive, albeit short, racing career. Sadly, the early seventies energy crisis meant the end of the 300 SEL 6.3. It will not be forgotten though, especially when you can wheel it anytime in Forza 4.
The 300 SEL 6.3 borrowed the engine from the the larger 600 luxury saloon, which is a 6.3 litre V8 engine. The M100 codenamed engine utilised mechanical fuel injection, a single overhead camshaft and aluminium cylinder heads. It was optimised to produce 300 hp (304 PS; 224 kW) and 435 ft·lb (590 Nm) of torque, which allowed a top speed of 153 mph (246 km/h). The SEL 6.3 was solely available with a 4-speed automatic transmission.