Family transportation has come a long way since it was all about piling in the back of the humble station wagon -- in particular, we're talking about the new Mercedez-Benz Concept B-Class E-Cell Plus EV that debuted today at the Frankfurt Motor Show. The plug-in series hybrid has a 136-horsepower electric motor with a 62-mile range, and a 67-horsepower, 1.0-liter three cylinder turbocharged gas engine for range-extending capabilities up to 373 miles. At low speeds, the petrol engine charges the lithium-ion batteries. When going faster, it acts on the car's front wheels, while the electric engine also chugs along -- very much like the
