The automotive world may be moving towards downsized engines, plug-in hybrids and fully electric performance cars, but Mercedes-AMG clearly isn't ready to let go of the V8 just yet. The German performance division has unveiled updated versions of the Mercedes-AMG GLE 63 S and Mercedes-AMG GLS 63, and while the changes may appear modest on the surface, the headline is a big one: both SUVs now produce 627bhp from their twin-turbocharged V8 engines.
At a time when many performance brands are embracing electrification and smaller-capacity powertrains, Mercedes-AMG is doubling down on one of its greatest strengths. The result is a pair of luxury SUVs that remain gloriously excessive, immensely powerful and unapologetically AMG. A 627bhp V8-powered seven-seat SUV may sound faintly ridiculous. That's because it is. But AMG has never been particularly interested in restraint.
More Power, New Hardware And A Different Character
At the heart of both SUVs sits AMG's legendary 4.0-litre twin-turbocharged V8. However, this isn't simply a carry-over engine with a software update.
The revised powerplant adopts technology from the latest AMG GT 63 Pro, including larger turbochargers, revised cooling systems and updated engine calibration. More significantly, it now features a flat-plane crankshaft architecture, marking a major departure from the traditional cross-plane AMG V8s enthusiasts have come to know and love.
The flat-plane crank design reduces rotating mass, improves throttle response and allows the engine to rev more freely. It also fundamentally alters the engine's character, delivering a sharper, more motorsport-inspired soundtrack compared to the deep, thunderous rumble associated with traditional AMG V8s.
Output rises from 603bhp to 627bhp, while torque remains unchanged at 850Nm. As before, the V8 is paired with a 48-volt mild-hybrid system featuring an integrated starter-generator capable of contributing an additional 22bhp during acceleration. While not designed for electric-only driving, the system improves responsiveness, smooths start-stop operation and enhances efficiency.
Power is sent to all four wheels through AMG's nine-speed Speedshift automatic transmission and the fully variable AMG Performance 4MATIC+ all-wheel-drive system.
In a world increasingly obsessed with downsizing, AMG's response appears refreshingly simple: keep the V8 and make it angrier.
Supercar Pace In A Family SUV
The additional power translates into even stronger performance.
Mercedes-AMG claims the GLE 63 S can accelerate from 0-100kph in just 3.8 seconds, while the larger and heavier GLS 63 completes the same sprint in 4.2 seconds.
Top speed remains electronically limited to 250kph, although the optional AMG Driver's Package raises that figure to 280kph.
Those figures place both SUVs firmly in sports-car territory despite weighing well over two tonnes and offering the practicality expected of large luxury SUVs.
The combination of immense power, all-wheel-drive traction and instantaneous mild-hybrid assistance means these AMG SUVs deliver performance that would have seemed unimaginable for family transport just a decade ago.
Sharper Styling, Same Road Presence
Visually, Mercedes-AMG has chosen evolution rather than revolution.
Both models receive revised AMG-specific front aprons, updated Panamericana grilles and redesigned LED lighting signatures. The changes are subtle but effective, helping modernise the appearance without disrupting the strong visual identity of either SUV.
The GLE 63 S remains the more overtly sporting option, available in both standard SUV and Coupe body styles. Aggressive bumpers, flared wheel arches and quad exhaust outlets ensure it looks every bit as potent as its performance figures suggest.
The GLS 63 takes a more sophisticated approach. While still unmistakably AMG, it balances its sporting credentials with the commanding presence and luxury expected of a full-size flagship SUV.
New paint finishes, fresh wheel designs and additional customization options further broaden the appeal of both models.
AMG Engineering Goes Beyond Straight-Line Speed
Massive horsepower figures may dominate the headlines, but AMG has devoted considerable attention to chassis technology.
Both SUVs feature AMG Active Ride Control, which combines adaptive air suspension with active anti-roll stabilisation. The system continuously adjusts suspension settings to balance ride comfort and handling precision, helping disguise the considerable size and weight of both vehicles.
Rear-axle steering comes as standard, improving agility at lower speeds while enhancing stability during high-speed driving. The fully variable AMG Performance 4MATIC+ system can distribute power precisely between the axles, while AMG-specific tuning ensures maximum traction and responsiveness.
Multiple drive modes allow drivers to tailor the vehicle's behaviour depending on conditions. Comfort mode prioritises refinement, while Sport, Sport+ and Race modes sharpen throttle response, steering characteristics, transmission behaviour and suspension settings.
Despite their dimensions, both SUVs have been engineered to deliver the kind of dynamic capability expected from a vehicle carrying the AMG badge.
A Cabin Packed With Performance Technology
Inside, the GLE 63 S and GLS 63 continue to blend cutting-edge technology with luxury craftsmanship.
Both models feature Mercedes-Benz's latest MBUX infotainment system displayed through twin 12.3-inch screens. One serves as the digital instrument cluster, while the other handles infotainment, navigation and vehicle functions.
AMG-specific displays provide detailed performance information including power output, torque delivery, lap timing, g-force readings and drivetrain data. The latest MBUX software also brings improved graphics, faster processing speeds and enhanced voice-control functionality.
Wireless Apple CarPlay and Android Auto are included, while over-the-air updates ensure the system remains current throughout ownership.
A redesigned AMG Performance steering wheel features integrated rotary controllers that allow drivers to quickly access drive modes and vehicle settings without taking their hands off the wheel.
Depending on specification, buyers can choose from a wide range of Nappa leather upholstery, carbon-fibre trim elements, AMG Performance seats and bespoke interior finishes. The GLS 63, in particular, continues to emphasise long-distance comfort with its spacious three-row layout and extensive luxury equipment.
The result is a cabin that feels every bit as sophisticated as a flagship Mercedes-Benz while retaining the sporting atmosphere expected of an AMG model.
One Of The Last Great AMG V8s?
Perhaps the most interesting aspect of these updated SUVs isn't the additional power.
It's the fact that they still exist at all.
The performance car landscape is changing rapidly. The latest C63 has abandoned its V8 in favour of a four-cylinder plug-in hybrid setup. Many rivals are moving towards electrified six-cylinder powertrains, while fully electric performance SUVs continue to gain momentum.
Against that backdrop, the GLE 63 S and GLS 63 feel increasingly special.
They remain among the few modern performance SUVs powered by a large-capacity twin-turbocharged V8. The effortless performance, immense torque and unmistakable character of eight cylinders continue to offer something that many electrified alternatives struggle to replicate.
The timing of these updates is particularly interesting.
Following criticism of AMG's four-cylinder plug-in hybrid C63, the arrival of two upgraded V8-powered SUVs feels like a reminder that Affalterbach hasn't forgotten what made the brand famous in the first place. While electrification continues to expand across the Mercedes-AMG range, the company clearly believes there is still a place for a big-capacity V8 at the top of its performance SUV hierarchy.
The updated GLE 63 S and GLS 63 embody a philosophy that is becoming increasingly rare in today's automotive landscape. They are unapologetically powerful, extravagantly engineered and packed with character.
At the same time, they remain practical luxury SUVs capable of carrying families and luggage in supreme comfort while delivering supercar-rivalling performance.
Whether these end up being among the final generations of AMG V8-powered SUVs remains to be seen. But for now, Mercedes-AMG is making one thing abundantly clear: the V8 isn't done yet. And with 627bhp on tap, it still has plenty to say.
