MB paired a 208-horsepower, 258-pound-foot, turbocharged four-cylinder with a 80-hp, 251-lb-ft electric motor for a potent overall output of 275 hp and 443 lb-ft of torque. That translates a 0-60 time of just 5.9 seconds and a top speed of 130 miles per hour.
For those that aren't interested in such frivolous numbers, though, the C-Class can still impress in more environmentally friendly ways. It can cover 20 miles to a charge and will hit speeds of up to 80 miles per hour (although not likely at the same time). Naturally, fuel economy figures aren't available at this early stage.
Beyond those powertrain changes, the C350 Plug-In is still the same relaxed, luxurious baby S-Class, with a class-leading interior that should really benefit from the quiet ride provided by an electric powertrain.
Take a look at our full gallery of live images of the new C-Class hybrid, straight from the Detroit's Cobo Hall.