The Mercedes-Benz 300 SLR (W196S) was an iconic 2-seat sports racer that took sportscar racing by storm in 1955, winning that year’s World Sportscar Championship before a catastrophic crash and fire at Le Mans ended its domination prematurely.

Designated “SL-R” (for Sport Leicht-Rennen, eng: Sport Light-Racing, later condensed to “SLR”), the 3-liter thoroughbred was derived from the company’s Mercedes-Benz W196 Formula One racer. It shared most of its drivetrain and chassis, with the 196’s fuel-injected 2,496.87 cc straight 8 bored and stroked to 2,981.70 cc and boosted to 310 bhp (230 kW).

Source: https://en.wikipedia.org/wiki/Mercedes-Benz_300_SLR