Mercedes Benz S Class - a series of luxury sedans produced by Mercedes-Benz

The Mercedes-Benz S-Class is a series of luxury sedans produced by Mercedes-Benz, a division of Daimler AG. The classification was officially introduced in 1972 with the W116 S-Class, which succeeded previous Mercedes-Benz models dating to the mid-1950s. As the flagship of the Mercedes-Benz lineup, the S-Class has debuted many of the company's latest innovations, including drivetrain technologies, interior features, and safety systems.

The S-Class has ranked as the world's best-selling luxury flagship sedan, and its latest generation, the W221 S-Class, premiered in 2006 as an all-new design. As in previous iterations, the W221 S-Class is sold in standard- and long-wheelbase versions; V6, V8, V12, diesel and hybrid powertrains are offered. All models built in Mexico or sold in the United States are only available in long wheelbase.

The name "S-Class" derives from the German word "Sonderklasse" of which "S-Class" is an abbreviation. Sonderklasse means "special class" (or rather: "In a class of its own"), and in automotive terms thus refers to "a specially outfitted car." Although used colloquially for decades, following its official application in 1972, five generations of officially named S-Class sedans have been produced. Past two-door coupe models of the S-Class were known as SEC and later S-Coupe. In 1998 they were spun off in a separate line as the CL-Class, however it will be re-designated as the S-Coupe for the 2011 model year.

Mercedes-Benz has traditionally introduced its safety innovations in the S-Class. For instance, the S-Class was the first car in Europe to incorporate airbags. S-Class safety features included innovations in active safety (accident avoidance), passive safety (collision protection), and holistic safety (integration of both active and passive safety features). Active safety features include: ABS braking in 1978 (acts to reduce braking distances and improve stopping control; co-developed with Bosch); traction control and Electronic Stability Program (ESP) in 1995 (improves driver control during difficult road conditions); and Brake Assist (provides full braking power during emergency stops). In 2005, a new infrared night vision feature was introduced (improves visibility during nighttime conditions). Despite the popular misconception, the S-Class was not the first car fitted with ABS braking technology, although some credit can be given for popularizing this now largely standard feature (ABS was initially an option on most models of the W126 S-Class).

Passive safety features include: crumple zones in 1957 (vehicle body structure absorbs the force of impact); three-point seatbelts in 1965 (provides additional torso/body protection); collapsible steering column (prevents the steering column from protruding into the cabin during accidents), strengthened occupant cell enhanced occupant protection during severe impacts (rollovers); pre-accident seatbelt tensioning (tightens seatbelts prior to impact), and sandwich platforms (allows the engine to slide under the occupants in a head-on collision).

A special armored version of the Mercedes-Benz S-Class has been produced, known as the S-Guard. Special features include the capability to withstand military-grade small arms fire and certain explosive devices, a self-sealing fuel tank, and a special alarm system. For 2009, Mercedes-Benz launched a long-wheelbase version of the S-Guard, known as the Pullman Guard. This model is 45 inches longer than the standard model and also has a higher roof and taller rear window with a different rake.

The S-Guard is widely used at the diplomatic level to protect world leaders. Ninety governments worldwide are known to use the S-Guard for transport of government leaders and dignitaries. The S-Guard is built on a special production line at the S-Class facility in Sindelfingen, Germany, with specific S-Guard enhancements integrated at multiple stages throughout the production process.