Start with what the Mercedes-AMG GT 63 S E Performance is: a car with Mercedes-Benz M176/M177/M178 engine, from Mercedes-AMG. What it meant takes a little longer.
What is underneath
The engine is Mercedes-Benz M176/M177/M178 engine. These are manufacturer figures carried by Wikipedia and Wikidata, not road-test measurements.
Its place in the line
Nearby in the Mercedes-AMG catalogue sit the Mercedes-AMG F1 W15 E Performance and the DTM AMG Mercedes C-Coupé.
The record
The open record for the Mercedes-AMG GT 63 S E Performance carries no verified engine, output, weight or price yet. MotorJury does not fill gaps with guesses; this entry gives the model a home in the catalogue and grows as sourced specifications and photographs arrive. Corrections: corrections@motorjury.com.