Mercedes just announced 2017 E43 AMG with 396 HP. Extra 34 HP than the C43 AMG (current C450 AMG), According to CAR Scoops and CAR & DRIVER. E43 has bigger turbo and different software to pump out that extra HP. I truly hope Mercedes doesn't put that in the GLE 43 Coupe when the time comes to change the name. I will be pissed!!!!!
http://www.carscoops.com/2016/03/new-mercedes-amg-e43-sedan-brings-396hp.html
http://www.carscoops.com/2016/03/new-mercedes-amg-e43-sedan-brings-396hp.html