Mercedes-Benz is taking the class they created even further with a four-door AMG GT entry which will be an even sportier take on the segment. If the vehicle offers lower weight than the CLS along with a dual clutch transmission Mercedes will have arguably the best driver's car in the class.
They sure look serious as these spyphotos point to a production variant. Additionally, if they make a hybrid version with 805 horsepower as their concept is said to have then they will blow away Porsche and their Panamera Turbo S E-Hybrid.
Bring it on Mercedes.