|The most iconic Mercedes sportscar ever is back. The original Gullwing, the 300SL, was a barely tamed racecar. Its 21st century successor is a supercar of the first order, and it’s also the first vehicle totally designed by the high-performance Mercedes–AMG GmbH group. While the SLS AMG is inspired by the original car, sporting similar gullwing doors and a long hood, short deck profile, under the skin it’s totally modern. There’s a high-tech aluminum chassis that weighs only 530 lbs., and an AMG-tuned 6.3-liter V8 nestled up front that puts out a stunning 571 peak horsepower, giving it performance the original Gullwing could only dream of. If the formidable power and throaty exhaust note aren’t enough, it’s comfortable enough to scoot across continents without breaking a sweat. A highly civilized car with ferocious acceleration, it’s the perfect grand tourer for the modern era.|
— Official description 
The 2011 Mercedes-Benz SLS AMG - abbreviated as M-B SLS AMG - is a RWD supercar by Mercedes-Benz featured in Forza Motorsport 3 as part of the Stig's Garage Car Pack and as standard in all subsequent main series titles.
The Mercedes-Benz SLS AMG is a front-engine, RWD supercar equipped with gullwing doors. Its name stands for "Sport Leicht Super" (lit. Sport Light Super). Between 2009 and 2014, the SLS AMG received other variants, including a high-performance Black Series variant.
The first Mercedes-Benz designed and built from scratch entirely by AMG, the SLS AMG features a 6.2 L (6,208 cc) M159 V8 engine producing 571 hp (426 kW) and 479 ft·lb (650 N·m), which is a variant of the M156 engine and Mercedes-Benz claimed would be "the world's most powerful naturally aspirated production series engine" ever produced. The SLS AMG was also Mercedes-Benz's last naturally aspirated sports/supercar.
The SLS comes with only a seven-speed dual-clutch automatic that uses a carbon fiber shaft, and using a lightweight aluminum frame, the car weighs only 3571 lb (1620 kg) with standard wheels.
The SLS AMG was succeeded by the Mercedes-AMG GT S in 2014.
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|Speed 8.0||Handling 5.7||Acceleration 7.3||Launch 6.9||Braking 5.8||A 597|
|Unlock: Purchase from the car dealer||Price: 270,000 CR|
|DLC: Requires the Stig's Garage Car Pack|
|Top Speed: missing data||Body Style: Super Car|
|Acceleration 0-60 mph (0-97 km/h): missing data||0-100 mph (0-161 km/h): missing data|
|Braking 60-0 mph (97-0 km/h): missing data||100-0 mph (161-0 km/h): missing data|
|Lateral G's 60 mph (97 km/h): missing data||120 mph (193 km/h): missing data|
|Speed 9.1||Handling 8.8||Acceleration 8.5||Launch 7.5||Braking 8.8||S 641|
|Unlock: Purchase from the Autoshow||Price: 270,000 CR or ? T|
|DLC: Requires the Pre-Order Car Pack|
|Body Style: Supercar|
|Conversion - Engine|
|V12 - SL 65 AMG|
|V12 - SL 65 AMG|
|Conversion - Drivetrain|
|1920s||Super Sport Kurz Barker Roadster|
|1950s||300 SL Coupé · 300 SLR|
|1970s||300 SEL 6.3|
|1980s||#63 C 9|
|1990s||#11 CLK-GTR · 190E 2.5-16 Evolution II · AMG CLK GTR|
|2000s||#3 CLK-DTM · Mercedes-AMG C-Class Touring Car · A200 Turbo Coupe · C 32 AMG · CL 65 AMG · CLK55 AMG Coupe · ML63 AMG · SL 65 AMG Black Series · SLR · SLR Stirling Moss|
|2010s||#33 A-Class · #4 - #9 E63 AMG V8 Supercar · #24 Racing Truck · #35 - #84 SLS AMG GT3 · A 45 AMG · C63 AMG · C 63 AMG Coupé Black Series · CL 65 AMG · E 63 AMG '10 · E 63 AMG '13 · G 65 AMG · S65 AMG · SLK55 AMG '10 · SLK 55 AMG '12 · SLS AMG · Unimog U5023 · X-Class|
|Pre-Tuned||A 45 AMG Forza Edition · A 45 AMG Horizon Edition · C 63 AMG Coupé Black Series Forza Edition · C 63 AMG Coupé Black Series Horizon Edition · SL 65 AMG Black Series Forza Edition|