Blue equals Green at Mercedes-Benz. From our fuel sipping BlueTEC diesels to the new S400 BlueHYBRID and now BlueEFFICIENCY, Mercedes is very focused on being environmentally friendly. BlueEFFICIENCY is a term that Mercedes-Benz is using to describe a push toward making current vehicles more energy efficient and reducing emissions without sacrificing comfort, safety and style. From using recyclable materials to being more aerodynamic, Mercedes-Benz vehicles can be greener even while burning fossil fuels. This video shows a few of the measures that went into developing the 2010 E-Class using BlueEFFICIENCY principles.