Following the debut of the 1970s generation W116, Mercedes-Benz began plans for the next-generation S-Class model in October 1973.

Codenamed 'project W126,' the project had specific goals: an improved ride, better handling and improved fuel efficiency.

These improvements were aimed at helping retain the 'S-Class' market leadership as the world's best-selling prestige luxury saloon.

Following the 1970s oil crisis, Mercedes-Benz had made fuel efficiency an especially pertinent goal named 'Energy Program', even in the large V8 engine versions of the S-Class.

In terms of the body design, the objective of the W126 design team was to produce a car that was sleeker and more aerodynamic than the previous model.

The application of lighter materials and alloys combined with thorough wind tunnel testing to reduce overall drag meant the car consumed about 10% less fuel than its predecessor.

After six years of development, the W126 was formally introduced at the Internationale Automobil-Ausst...