This report from MotorTrend regarding the axing of the E550 is odd as an E400 actually seems to just slot right into the lineup. Plus, without an E550 model what will the competition be for the BMW and Audi mid-range V8 sedans? Those do not seem to be disappearing any time soon. Mercedes-Benz would not just abandon such a lucrative market.
If this is true then a turbo V8 in the E-Class will only be available in the E63 AMG. It also means this is a precedent other 550 models will be set to follow. The addition of a turbocharged V6 is great news but not when it is at the expense of the M278 V8. Chances are MotorTrend got this wrong and if they did BenzBoost will be the first to point it out.