The Mercedes-Benz 500SEC 5.4 AMG was a series of C126 S-Class Coupes introduced in 1984. This series of cars was based on the 500 SEC, and featured tuning and refinement from famed Mercedes tuner AMG. The 5.4 AMG was created before AMG was acquired by Mercedes-Benz, and featured an enlarged 5.4L V8 engine, as well as a trademark 'Wide Body' bodykit. Production of the 5.4 AMG was very limited, with examples built until 1986.