Assembly of Mercedes-AMG's new super sedan has begun in Sindelfingen, Germany. The AMG GT63 4-door Coupe is just the third model to come to fruition entirely under the stewardship of Affalterbach following the mega SLS AMG and its successor the AMG GT.

As a spiritual successor to the CLS 63, Mercedes claims the GT 4-Door Coupe is about as close as you can get to a fully fledged sports car while still having four doors, a claim it backs up by offering the new GT 63 S model as the most powerful car in its lineup thanks to a 4.0-liter twin-turbo V8 that jams out 630 horsepower and 664 pound-feet of torque.

Additionally, there will be an even more powerful version coming online in a few years as Mercedes has confirmed a hybrid powertrain with over 800 hp will make it to showrooms as Mercedes combines high everyday comfort with the very latest in sports car engineering.

Precluding the start of production, Mercedes pledged to invest $1.75 billion into Sindelfingen's assembly lines before 2020, while a further $700 million is being invested into research and development at the facility which also produces some versions of the E-Class, GLA, CLS, S-Class, Maybach, and the AMG GT. The investments are almost certainly tied to the company's plans to produce its newly launched EQ family of vehicles at the plant as well.

The GT Coupe is expected to launch in Europe sometime this October, before making its way to the United States for the start of 2019. Early American buyers will be offered a choice between the GT 63 and GT 63 S, before the entry-level GT 53 model's expected arrival in the summer.