When the performance boffins at Mercedes-AMG revealed plans of unveiling its first E Performance hybrid car, we were expecting a grand-touring sports car like the next-generation SL, or maybe a supercar like the Mercedes-AMG One. As it turns out, Mercedes-AMG's first hybrid-performance vehicle is a four-door saloon based on the GT four-door. The 2023 Mercedes-AMG GT 63 S E Performance is a hybrid grand-touring sports sedan. But unlike standard hybrids, Mercedes is using hybridization to ...