The hybrids were unveiled at the Frankfurt Motor show last year. The S-Class hybrid will be a "mild" version similar to the Honda Accord. Mild hybrids are primarily powered by an internal combustion engine with electric motors providing assistance. Full hybrids such as the Toyota Prius or Ford Escape alternate between their gasoline or electric motors depending on driving conditions.
The article did not state why the automaker did not use the two-mode hybrid it developed with GM and BMW or whether it will either be a "Direct Hybrid" or the Bluetech version or both.
[Source: Wirtschaftswoche via Reuters]