It appears to Driving Fans as though Mercedes-Benz top guy Dieter Zetsche has had enough with BMW and Audi attempting to muscle in on its luxury-car turf. That would explain the flurry of product activity these days. The latest to be revealed behind closed doors is the 2015 C-Class that, next to the new-for-2014 CLA-class, is the least expensive M-B sedan you can buy in North America. The C-class features styling that’s similar to the popular E-class sedan, but at a base price that’s expected to start in the mid- to upper $30,000 range. The fact that the new model weighs about 220 pounds less than the outgoing car should make its base turbocharged 1.8-liter four-cylinder engine move the car with reasonable authority. Both turbo-diesel and hybrid models are also in the works, as is a new twin-turbo 4.0-liter V8 in the sporty AMG edition.