Next-Gen Mercedes G-Class Prototype Test Drive

The Mercedes-Benz G-Class has long epitomized rugged luxury, blending boxy design with extreme off-road talent. The latest prototype for the 2025 G550 introduces significant refinements, replacing the thirsty V8 with a turbocharged inline-six mild hybrid for better efficiency and torque. Our hands-on evaluation reveals a vehicle that maintains its iconic character while delivering modern sophistication on roads and trails alike.

Powertrain Evolution: From V8 to Inline-Six Hybrid

Central to the prototype’s updates is the new engine under the hood. The previous G550 relied on a twin-turbo V8 producing substantial power but at the cost of high fuel consumption. Now, a turbocharged 3.0-liter inline-six with mild-hybrid assistance steps in, generating around 100 lb-ft more torque than before. This shift promises quicker acceleration—potentially shaving time off the 0-60 mph sprint from the current 5.6 seconds—while improving economy without sacrificing the G-Class’s muscular pull.

Paired with a responsive nine-speed automatic transmission, the powertrain responds swiftly to throttle inputs. During our drive on mixed snow and ice in Sweden, the engine emitted a rousing note that enthusiasts will appreciate, though V8 purists may await the AMG G63 variant. The mild-hybrid system aids low-end torque and smooths gear shifts, making everyday driving more refined.

• Increased torque: Approximately 100 lb-ft boost over V8 for better hauling and acceleration.
• Fuel efficiency gains: Addresses prior model’s weakness, ideal for long hauls.
• Transmission tuning: Nine-speed auto delivers precise, quick shifts on and off pavement.

Enhanced Driving Dynamics and Suspension Upgrades

Despite its imposing size and weight, the G-Class prototype exhibits surprising agility. Engineers have lightened the front end with the slimmer inline-six, improving turn-in sharpness. Revised dampers react faster, reducing body roll to a progressive sway that enhances comfort on winding roads.

On pavement, the ride is smooth and composed, with minimal wind noise at highway speeds—a notable improvement. Venturing onto challenging surfaces like snow-covered tracks, the four-wheel-drive system, aided by Falken winter tires, provides exceptional grip. The solid rear axle and ladder-frame chassis ensure it conquers bumps with control, never feeling unsettled.

Off-Road Mastery: New Modes and Proven Hardware

The G-Class’s off-road credentials remain peerless, bolstered by three locking differentials, low-range gearing, and a robust chassis. The updated MBUX infotainment adds a Trail mode alongside Sport, Comfort, Eco, Sand, Rocks, and G Mode. Trail suits light tracks, while the hardware tackles extreme obstacles effortlessly.

In testing, the prototype scrambled over rocks and waded through snow with ease. The lighter nose aids approach angles, and suspension travel maintains wheel contact. For the high-performance G63, expect Traction Pro and Active Balance Control, using braking and torque vectoring for even greater capability.

High-speed stability shone on a frozen lake, where we sustained 80 mph drifts with differentials locked and ESP off—defying expectations for such a heavyweight SUV.

Interior Refinements and Tech Integration

Inside, the cabin retains its upright, throwback vibe with flat flanks and a steep windshield, evoking classic G-Wagens. Yet, modern touches abound: an upgraded MBUX interface with a central touchscreen streamlines controls. New drive modes are easily selectable, and the layout prioritizes driver focus.

Comfort levels impress, with supportive seats and reduced noise. The prototype hints at production refinements like better materials and connectivity, positioning it as a luxury daily driver alongside its trail beast persona.

Future Variants: AMG G63 and Electric EQG

While the G550 prototype focuses on balance, the AMG G63 promises V8 fury with Active Ride Control—a hydraulic system eliminating anti-roll bars for superior agility and comfort. It includes unique modes like Traction Pro for precise trail work.

Looking ahead, the EQG electric prototype introduces four motors—one per wheel—for tank-turn capability and superior traction sans differentials. With low-range reduction gears, Rock, Sand, and Trail modes, and a fortified chassis, it matches ICE models’ wading depth while offering brake-free downhill control.

• G63 highlights: Hydraulic suspension, V8 power, advanced balance modes.
• EQG innovations: Individual wheel torque, on-spot rotation, enhanced rough-terrain grip.

Performance Benchmarks and Real-World Testing

Our evaluation spanned Swedish winters and simulated trails, confirming the prototype’s versatility. On-road, it cruises effortlessly at 79 mph (127 kph) with poise. Off-road, low-range precision and grip make steep inclines trivial. Expect production models to refine these traits further.

Fuel economy improvements stem from the efficient six-cylinder, potentially rivaling lighter SUVs without compromising capability. Pricing starts around $149,900 for top trims, justifying the premium for its blend of heritage and innovation.

Pros and Cons at a Glance

Why the G-Class Prototype Excels

Mercedes has addressed key critiques: efficiency, agility, and interface usability. The result is the most capable G-Wagen yet—faster, greener, and more livable. Whether drifting frozen lakes or tackling rocks, it redefines luxury off-roading.

Frequently Asked Questions (FAQs)

What engine powers the 2025 G550 prototype?

A turbocharged inline-six mild hybrid, offering more torque and better efficiency than the old V8.

Does the prototype have new off-road modes?

Yes, including a Trail mode, with G63 adding Traction Pro and Active Balance.

How does the EQG differ from the standard G-Class?

The EQG uses four electric motors for individual wheel control, tank turns, and superior traction without traditional diffs.

Is the ride more comfortable now?

Absolutely—revised dampers and lighter front end improve composure on and off road.

When will production models arrive?

Expected soon, with full reviews pending final specs.