Mercedes-AMG GLE 63 and GLS 63 Get New Flat-Plane V8

The Mercedes-AMG GLE 63 and GLS 63 return with a major powertrain update. Therefore, AMG fits both giant SUVs with the new M177 EVO engine. Furthermore, this revised V8 brings a flat-plane crankshaft, a new intake camshaft and a new fuel injection system. Based on this, the Mercedes-AMG GLE 63 and GLS 63 carry what AMG calls its future-proofed V8. So, both cars also receive a facelift with new lights, grilles and bumpers. Ultimately, AMGs are about to get loud again.

The M177 EVO Engine: What Changed

The M177 EVO is not a rebadge of the old unit. Therefore, AMG engineers made fundamental changes to the 4.0-litre twin-turbo V8 architecture. Furthermore, the flat-plane crankshaft is the headline change. Additionally, a new intake camshaft and direct injection system complete the upgrade.

Based on this, the M177 EVO first appeared in the updated S-Class before moving to AMG duty. Consequently, the GLE 63 and GLS 63 are the first AMG applications of this engine. AMG confirms it will spread across the wider range shortly.

The Power Numbers: 604hp

Despite strict global emissions requirements the M177 EVO delivers the same headline power as before. Therefore, both the Mercedes-AMG GLE 63 and Mercedes-AMG GLS 63 produce 604 horsepower and 627lb ft of torque. Furthermore, both cars carry mild-hybrid assistance through an integrated starter generator. Additionally, the 48-volt system adds 23 extra horsepower and boosts torque at low revs.

Based on this, the mild-hybrid improves efficiency without diluting the V8 character. Consequently, AMG boss Michael Schiebe confirmed: “Our V8 is a central component of our performance DNA.” These power figures prove that commitment is real.

Performance: 3.9 Seconds for the GLE

The performance numbers match the engine upgrade. Therefore, the Mercedes-AMG GLE 63 covers 0-62mph in 3.9 seconds. Furthermore, this time applies to both the standard SUV and the Coupe body. Additionally, the larger Mercedes-AMG GLS 63 reaches 62mph from rest in 4.2 seconds.

Based on this, a new valve-controlled exhaust ensures neither car is quiet. Consequently, the flat-plane crank produces a higher-pitched and more sporting note than the previous engine. Both cars will sound considerably more exciting than before.

Chassis: Reading the Road 1,000 Times Per Second

Both cars get full air suspension and active roll stabilisation. Therefore, AMG’s system reads driving manoeuvres and road surface up to 1,000 times per second. Furthermore, all-wheel drive and a locking rear differential come standard on both. Additionally, wheels reach 22 inches on the GLE and 23 inches on the GLS.

Based on this, the chassis package represents the current state of the art for performance SUVs. Consequently, both cars handle considerably better than their size and weight suggest.

The Facelift: New Lights and Grilles

Both cars receive a visual refresh alongside the engine updates. Therefore, new front and rear lights, revised grilles and updated bumpers refresh the exterior. Furthermore, the changes align both cars with current Mercedes-AMG design language. Additionally, existing owners will recognise both cars while new buyers get a product that looks current.

Based on this, the facelift complements rather than distracts from the powertrain story. Consequently, the visual updates feel purposeful rather than cosmetic.

Inside: New Wheel and MB.OS

The cabin updates focus on the most important daily driver touchpoints. Therefore, a new AMG steering wheel trimmed in Nappa leather improves the primary interface. Furthermore, all screens now run on the new MB.OS operating system. Additionally, response speed and interface quality improve noticeably across the whole system.

Based on this, the interior updates make both cars feel genuinely current. Consequently, buyers of the Mercedes-AMG GLE 63 and GLS 63 receive a complete update. For the latest Mercedes-AMG news across the Middle East, follow GearsME. For full official specs, visit the official Mercedes-AMG website.

Why the Flat-Plane Crank Matters

A flat-plane crank positions pins at 180 degrees rather than the 90-degree arrangement of a traditional V8. Therefore, this allows the engine to rev more freely and quickly. Furthermore, flat-plane cranks appear in Ferrari V8s and high-performance sports cars. Additionally, the trade-off is a more vocal and higher-pitched exhaust note.

Based on this, fitting a flat-plane crank to a performance SUV is a meaningful engineering decision. It rewards drivers who use the upper rev range. Consequently, the M177 EVO delivers something the previous unit genuinely could not.

AMG’s V8 is Secured for the Long Term

Many manufacturers are retiring their V8 programmes under emissions pressure. Therefore, AMG chose the opposite direction entirely. Furthermore, Schiebe confirmed: “We have fundamentally revised the power unit and secured its presence in our portfolio for the long term.” Additionally, this represents a clear signal about AMG’s position on electrification and combustion coexistence.

Based on this, the M177 EVO is AMG’s answer to what happens to the V8 in a regulated world. The answer is that it stays. Consequently, the Mercedes-AMG GLE 63 and GLS 63 are not the last V8 AMG SUVs — they start the next chapter.

Final Thoughts: The V8 Is Not Going Anywhere

Ultimately, the Mercedes-AMG GLE 63 and GLS 63 prove that AMG’s V8 commitment is engineered not sentimental. Furthermore, 604 horsepower, flat-plane crank, 3.9-second 0-62mph and MB.OS in one package is a complete update. Consequently, anyone who wants a performance SUV with a real V8 has two very compelling reasons to visit a Mercedes-AMG dealer.

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