In about a year, the newest Bluetec ML320 CDI will arrive and be able to meet even California's emissions regulations. The diesel E-Class will continue as a 42-state model until it too receives the advanced Bluetec system. Whether or not Mercedes will figure out a way to keep the diesel premium down around $1,000 per vehicle is another potential stumbling block for the German automaker. Rumor has it this new Bluetec costs a lot more to produce and Mercedes-Benz might have to subsidize the diesels to keep them competitive pricewise.
[Source: Edmunds Auto Observer]