6. Mercedes-Benz S-Class (1954-Present)
The Mercedes-Benz S-Class is the benchmark for luxury sedans, with a production history spanning 70 years. It introduced many automotive innovations such as fuel injection, airbags, and advanced safety systems. The S-Class name officially began in 1972, but the lineage dates back to the 1950s, representing the pinnacle of comfort and technology. The S-Class has consistently been the first to debut cutting-edge features that later become standard across the industry, making it a rolling showcase of automotive advancement and opulence.