New Mercedes-AMG GLE 63 and GLS 63 Return to V8 Power with Mild-Hybrid Tech
Mercedes-AMG is pivoting back to its high-performance roots by reintroducing the 4.0-liter biturbo V8 engine in the refreshed GLE 63 and GLS 63 SUV models. According to official company specifications, the M177 Evo engine—now paired with a 48V mild-hybrid system—delivers 612 horsepower and 850 Nm of torque, signaling a strategic shift away from the brand’s recent focus on plug-in hybrid powertrains for its flagship SUVs.
Why is Mercedes-AMG returning to the V8 engine?
The return to the V8 configuration addresses consumer demand for traditional performance characteristics that plug-in hybrid setups often struggle to replicate in luxury SUVs. Mercedes-AMG notes that the new M177 Evo unit features a flat-plane crankshaft, updated ignition timing, and refined turbocharging to meet modern efficiency standards without sacrificing power. By integrating a 48V mild-hybrid system that provides an additional 17 kW and 205 Nm of torque, the manufacturer balances raw displacement with regulatory compliance.
How does the performance compare to previous models?
The updated powertrain allows the GLS 63 S to reach 100 km/h in 3.9 seconds, while the standard GLS 63 manages the sprint in 4.2 seconds. Both models are electronically limited to a top speed of 280 km/h. This performance is managed via a nine-speed automatic transmission and the 4Matic+ all-wheel-drive system, which includes an electronically controlled rear differential for improved traction. Compared to earlier iterations, the integration of the mild-hybrid assist provides a more immediate torque response, bridging the gap between internal combustion and full electrification.
The AMG Ride Control+ air suspension system allows drivers to increase the vehicle’s ground clearance by up to 55 millimeters, providing versatility for varied terrain without compromising the stiff, responsive handling required for sport driving.
What technical refinements define the M177 Evo engine?
The M177 Evo engine, first introduced in the S-Class, incorporates significant internal modifications to enhance longevity and efficiency. According to Mercedes-AMG, these updates include a redesigned intake and exhaust system, upgraded camshafts, and a revised fuel injection system. These changes are intended to optimize airflow and thermal management, ensuring the engine remains reliable under the high-stress conditions associated with heavy SUV platforms.
Pro Tip: Maximizing your AMG experience
Utilize the AMG Performance exhaust system’s active flap to adjust your vehicle’s acoustic profile. On long highway commutes, setting the flaps to a quieter mode reduces cabin drone, while switching to “Sport” or “Sport+” modes opens the flaps for an authentic, deep V8 resonance.
Frequently Asked Questions
- Is the new V8 a plug-in hybrid? No, the refreshed GLE 63 and GLS 63 use a 48V mild-hybrid system, which is distinct from the heavy plug-in hybrid architectures found in other AMG models.
- What is the top speed of these SUVs? Both the GLE 63 and GLS 63 are electronically capped at 280 km/h.
- Are there interior changes? Yes, the cabin features updated AMG-specific graphics on the instrument cluster and expanded customization options through the Manufaktur program.
Are you a fan of the return to V8 power, or do you prefer the efficiency of hybrid technology? Share your thoughts in the comments below or subscribe to our newsletter for the latest updates on luxury performance vehicle releases.