The Mercedes-Benz W116 is a series of flagship luxury sedans produced from September 1972 until 1980. The W116 automobiles were the first MercedesBenz models to be officially called S-Class (S-Klasse in Germany), although earlier sedan models had already unofficially been designated with the letter 'S' – for Sonderklasse or "special class."
In 1975, the W116 was upgraded with a new fuel injection system to comply with revised exhaust emission standards in European markets. A slight power reduction was a result of this update. In 1978, a series of engine upgrades restored original performance levels with new fuel injection systems.