2016 Mercedes-Benz S550 Plug-In Hybrid Arriving in U.S. Next Spring
The team at Green Car Reports has driven a prototype of the U.S.-spec car, reporting that is is quiet, luxurious, and likely to carry a six-figure price tag. And it will be followed within a year by two more plug-in hybrids using the same powertrain: a smaller C-Class sedan, and…