It seems that Mercedes-Benz is finally joining the hybrid technology ranks. Word is going around that the first plug-in Mercedes-Benz shall be the S-Class. The move comes as little surprise, as the brand’s main competitors have created their own alternative energy powertrains. Examples include the BMW Active Hybrid 7 Series and the Lexus LS460H. Will the plug-in Mercedes-Benz be a success?The plug-in Mercedes-Benz S-Class will mark the brand’s official launch into the hybrid market. It will hit California showrooms first, where the Prius and alternative energy reign supreme. By the end of 2016, the first electric Mercedes-Benz S-Class is expected to be available all around the United States.