Mercedes-AMG is deep into developing the 2027 S 63, the high-performance version of the latest Mercedes S-Class. Unlike the current standard models, this AMG variant reportedly skips the plug-in hybrid system, opting instead for a more traditional powertrain centered on a V8 engine. New spy photos reveal the difficulties the carmaker is encountering with European emissions rules as it pursues this path.
Testing Reveals Challenges with Emissions Compliance
Spy photographers recently spotted a prototype of the upcoming Mercedes-AMG S 63 on public roads in southern Europe. The vehicle was undergoing emissions testing, suggesting the development team is still working hard to meet strict particle pollution limits. This issue likely stems from the AMG model’s decision to abandon plug-in hybrid (PHEV) technology, which helps other Mercedes S-Class versions comply more easily with regulations.
The focus on purely combustion-based power means Mercedes-AMG must fine-tune the V8 engine and exhaust systems carefully to gain certification. The standard S-Class extensively uses PHEV setups, combining petrol powertrains with battery assistance. AMG’s move away from this approach signals a different target buyer who prefers a more classic sports sedan experience without the extra weight or complexity of an electrified drivetrain.
Behind the Hood: More Power, Less Electrification
Under the hood, the new S 63 will feature a twin-turbocharged 4.0-liter V8 petrol engine supported by a mild hybrid system (MHEV) running on 48 volts. This setup boosts efficiency but falls short of full plug-in hybrid capabilities. The engine is expected to produce well over 600 horsepower, paired with the nine-speed 9G-TRONIC automatic transmission and Mercedes’ 4MATIC+ all-wheel drive system.
By sticking to a mild hybrid instead of a full PHEV, AMG aims to deliver a sharper, more engaging driving experience. However, the downside is tougher emissions approval hurdles in Europe, as highlighted by the current testing phase.
Launch Timeline
The Mercedes-AMG S 63 is scheduled to debut before the end of 2024. After the official reveal, customers can expect the car to reach dealerships during the first half of 2027. These timelines put pressure on the engineering team to resolve emissions issues quickly and finalize the performance setup.
This new AMG S 63 highlights the balance Mercedes is striking between emissions regulations and maintaining the brand’s signature powerful driving character in a changing automotive landscape.
Source: motor.es