Confusing? A bit. So the E-Sedan will only offer a V8 with an AMG variant whereas the coupe will only offer a V8 as a 550 model with no AMG variant. Someone at Mercedes-Benz must be bored and making changes for the sake of change.
No E550 sedan rival to the Audi S6 or the BMW 550i? It would not be a big deal if the E400 sedan was not underpowered compared to the M278 V8. 329 horsepower and 354 pound-feet of torque for the 3.0 liter twin turbo direct injected V6 is certainly very nice as is another boosted motor option being added to the lineup (which is likely to trickle to the SLK/C/GLK, etc.) but it hardly makes up for the gap the E550 filled with its 402 horsepower 4.6 liter M278 twin turbo V8 which also offers 73 additional pound-feet of torque on the new twin turbo V6.
Mercedes-Benz seems to believe buyers going for the E550 simply step up to the E63 AMG. Yet in the coupe this is not an option. BenzBoost has a solution. Offer an E63 AMG coupe and convertible as well and we'll let this E550 being cancelled business slide.