Mercedes-AMG will retain V8 engines for the 2026 facelifts of its GLE and GLS SUVs, with the GLS 63 producing 603 horsepower, according to automotive industry reports. The update ensures that high-displacement internal combustion power remains available in the luxury SUV lineup despite a broader industry shift toward electrification.
- GLS 63 Output: 603 horsepower.
- GLE 63 S Engine: M177 Evo featuring a flat-plane crankshaft.
- Availability: Expected for the 2026 model year.
GLS 63 Power and Performance Specs
The upcoming GLS 63 facelift focuses on maintaining high-output performance for the brand’s largest SUV. According to media reports, the vehicle will deliver 603 horsepower, positioning it as a high-luxury, high-performance option in the full-size SUV segment.
GLE 63 S and the M177 Evo Engine
The GLE 63 S facelift will introduce the M177 Evo engine. A key technical update in this powertrain is the implementation of a flat-plane crankshaft, according to technical reports.
Unlike traditional cross-plane crankshafts used in most V8s to reduce vibration, a flat-plane design allows the engine to rev higher and breathe more efficiently. This architecture is typically reserved for high-performance supercars to improve throttle response and create a distinct exhaust note, though it often requires more robust engine mounting to manage increased secondary vibrations.
The Strategic Retention of V8 Power
The decision to keep V8 engines in the 2026 GLE and GLS models marks a refusal to phase out large-displacement combustion engines immediately. While many manufacturers are transitioning to four-cylinder hybrids or fully electric powertrains, these facelifted AMG models will continue to offer traditional V8 power to meet specific luxury market demands.
