Updated Mercedes-AMG GLE 63 S Debuts With Controversial Flat-Plane-Crank V8

Mercedes-AMG has finally unveiled the updated GLE 63 S, and the changes go far beyond a typical facelift. Available in both traditional SUV and Coupe body styles, the high-performance luxury model also becomes the first vehicle to receive AMG’s next-generation V8 engine—a powerplant that has already sparked heated discussions among enthusiasts.

European dealers are preparing to open order books, with pricing starting at roughly $185,000 at current exchange rates. The refreshed GLE 63 S adopts styling cues from the recently updated GLE lineup. Up front, the massive grille is joined by redesigned LED headlights featuring distinctive three-pointed-star graphics. Around back, Mercedes has reduced the amount of chrome trim and added a gloss-black light bar connecting the taillights, while the signature oval exhaust outlets remain.

Inside, the cabin stays true to AMG tradition. Deeply bolstered sport seats, a performance steering wheel, and an updated infotainment interface headline the changes. One notable addition is a new set of touch-sensitive rotary controls integrated into the steering wheel spokes, giving drivers quicker access to various drive modes and performance settings.

Although displacement remains unchanged at 4.0 liters, AMG engineers made a dramatic change under the hood. To meet upcoming Euro 7 emissions regulations, they replaced the traditional cross-plane crankshaft with a flat-plane design. That also required a revised firing order. While flat-plane V8s are praised for their performance and efficiency, they typically sacrifice the deep exhaust note that has long defined AMG engines. The same issue surfaced with the AMG GT Black Series, but engineers in Affalterbach insist they have found a way to preserve much of the V8’s signature soundtrack.

The new engine receives far more than a different crankshaft. AMG engineers redesigned the fuel injection, intake, and exhaust systems, added a new intake camshaft, and upgraded both the compressor and turbocharger housings. The exhaust system itself is more sophisticated and now includes a particulate filter for every market worldwide.

Output remains identical to the outgoing model. The twin-turbocharged V8 produces 603 horsepower and 627 pound-feet of torque. However, it is now paired with a 48-volt mild-hybrid system featuring an integrated starter-generator. The electric assistance contributes an additional 23 horsepower and 151 pound-feet of torque, helping improve low-end response and making the stop-start system smoother and less intrusive.

Power is sent to all four wheels through AMG’s nine-speed Speedshift automatic transmission. To handle the increased demands, Mercedes strengthened the driveline with upgraded driveshafts and larger brakes. The chassis continues to rely on adaptive air suspension and active anti-roll technology. Most markets will offer either 21-inch or 22-inch wheels.

The upcoming Mercedes-AMG GLS 63, the GLE’s larger three-row sibling, will receive the same powertrain. Pricing for that model is expected to begin around $208,000.

For now, buyers can place orders for the new Mercedes-AMG GLE 63 S, which combines aggressive styling, advanced technology, and a new-generation V8 that AMG engineers worked tirelessly to develop. Whether enthusiasts embrace the flat-plane-crank design remains to be seen, but one thing is certain: AMG is determined to keep the V8 alive for as long as possible.