Filed under: Hybrids/Alternative, Sedans/Saloons, Green, Mercedes-Benz Click above for high-res gallery of the S-Class BlueEFFICIENCY Mercedes-Benz really wants you to know how green its new line of diesel vehicles can be. To that end, the German automaker calls them Blue and capitalizes EFFICIENCY. Subtle, no? In an effort to earn the badge, MB has tweaked its largest [...] [...]



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