The 2025 Mercedes-AMG G63 arrives as the latest evolution of an icon that has barely changed silhouette in four decades. Beneath that unmistakable boxy shape sits a 4.0-liter twin-turbo V8 now aided by a 48-volt mild-hybrid system, producing 621 hp and 627 lb-ft of torque. It hits 60 mph in 3.7 seconds, yet retains three locking differentials, a low-range transfer case, and 35 inches of water-fording depth. This guide breaks down every meaningful update, real-world capability, ownership costs, and how it stacks up against rivals so you can decide if the G63 belongs in your garage.
Quick Specs at a Glance
| Specification | 2025 G63 AMG Detail |
|---|---|
| Engine | 4.0L twin-turbo V8 + 48V mild-hybrid (ISG) |
| Output | 621 hp @ 6,000 rpm / 627 lb-ft @ 2,500–5,000 rpm |
| Transmission | AMG SPEEDSHIFT 9-speed automatic |
| 0–60 mph | 3.7 seconds (mfr. estimate) |
| Top Speed | 137 mph (210 km/h) / 149 mph with AMG Driver’s Package |
| Fuel Economy (EPA) | 14 city / 18 hwy / 16 combined mpg |
| Ground Clearance | 11.8 in (adjustable via air suspension) |
| Wading Depth | 35 in (890 mm) |
| Approach / Departure / Breakover | 31.9° / 30.9° / 26.0° |
| Curb Weight | ~5,800 lb (2,630 kg) |
| Towing Capacity | 7,000 lb (3,175 kg) |
| Base MSRP | $156,450 (plus $1,150 destination) |
Figures based on manufacturer data and EPA certification; real-world results vary by equipment and driving style.
What’s New for the 2025 Model Year
Mercedes focused on electrification compliance and cabin tech rather than sheet metal. The headline change is the 48-volt integrated starter-generator (ISG) that adds up to 20 hp and 148 lb-ft of electric torque for brief bursts, smooths stop-start transitions, and powers the vehicle’s electrical architecture. Other updates include:
- MBUX generation 2 with “Hey Mercedes” natural-language voice control, wireless Apple CarPlay/Android Auto, and over-the-air map updates.
- Standard AMG Ride Control air suspension with adaptive damping and selectable spring rates per drive mode.
- Revised front bumper, larger AMG-specific grille slats, and new 22-inch forged wheel designs (optional 21s standard).
- Manufaktur program expansion: 30+ new exterior paints (including matte Magno finishes) and 15 additional interior leather/wood combos.
- EPA-certified fuel-economy improvement of roughly 1 mpg combined versus the 2024 model, credited to the ISG’s energy recovery.
The G63 still rides on a body-on-frame ladder chassis—unique in the segment—and continues to be hand-assembled in Graz, Austria.
Powertrain & Performance
Mild-Hybrid V8 Output
The M177 V8 retains its hot-vee turbo layout for compact packaging and rapid spool. The belt-driven ISG sits between engine and transmission, providing:
- Electric launch assist from standstill, eliminating turbo lag off the line.
- Coasting function at highway speeds: engine shuts off, ISG maintains 12V/48V systems, then restarts imperceptibly.
- Regenerative braking up to 15 kW, feeding the 48V lithium-ion pack under the cargo floor.
In practice, the ISG makes the V8 feel more responsive below 2,000 rpm—useful when crawling rocks or merging onto short on-ramps.
Transmission & Driving Modes
The 9-speed multi-clutch automatic uses wet clutches for quicker shifts and a dedicated “M” manual mode with paddle shifters. Drive modes alter shift points, throttle mapping, steering weight, suspension stiffness, ESP thresholds, and exhaust flap position:
| Mode | Best For | Key Characteristics |
|---|---|---|
| Comfort | Daily commuting, long highway trips | Softest damping, early upshifts, relaxed steering, quiet exhaust |
| Sport | Canyon roads, spirited on-ramp merges | Firmer damping, later shifts, heavier steering, louder exhaust |
| Sport+ | Track days, maximum acceleration | Stiffest suspension, aggressive downshifts, ESC in “Sport Handling” |
| Individual | Custom blend | Mix any parameter from other modes |
| Off-Road (Low/High) | Loose surfaces, steep grades | Locks center diff, raises ride height, softens throttle, enables crawl control |
| Rock / Sand / Trail (sub-modes) | Specialized terrain | Tailored diff lock timing, wheel-spin allowances, suspension articulation |
A common mistake is leaving the truck in “Comfort” on a gravel road—the soft damping allows excessive body float. Switch to “Off-Road High” for better control.
Real-World Acceleration & Towing
Independent testing (Car and Driver, 2025) recorded 0–60 in 3.5 seconds on a prepped surface—two-tenths quicker than Mercedes’ claim. The 7,000-lb tow rating is class-competitive, but the short wheelbase (113.8 in) and high center of gravity demand a weight-distributing hitch and trailer brakes for anything over 5,000 lb. Payload is modest at ~1,300 lb; load the roof tent and gear carefully.
Off-Road Hardware & Capability
Three Locking Differentials & Low Range
The G63’s party trick remains its three electronically controlled, driver-selectable locking differentials (center, rear, front). Unlike brake-based “lockers” on crossover SUVs, these are mechanical dog-clutch units that bind the axle shafts 100% when engaged. Engage sequence:
- Stop, shift to Neutral.
- Press “LOW RANGE” button (confirms in cluster).
- Press “DIFF LOCK” buttons individually (center → rear → front) as terrain demands.
- Proceed at idle; the truck will crawl at ~1 mph in first gear low range without throttle input.
This system lets the G63 climb a 100% grade (45°) on a surface where only one tire has traction—a scenario that would stop any brake-based AWD.
Geometry: Approach, Departure, Wading
| Angle / Depth | Measurement | Practical Implication |
|---|---|---|
| Approach | 31.9° | Clears tall rock ledges without bumper contact |
| Departure | 30.9° | Rear overhang short enough for steep descents |
| Breakover | 26.0° | Long wheelbase requires careful line selection on crests |
| Wading | 35 in (890 mm) | Sealed axles, raised breathers, waterproof ECU connectors |
The air suspension can raise an additional 1.6 in (40 mm) in “Off-Road High” mode, but reverts to normal height above 37 mph.
Practical Off-Road Tips
- Tire choice matters more than lockers. Factory 275/50R21 all-seasons are inadequate for mud or sharp rock. Fit 285/65R18 or 33-inch all-terrains on beadlock-capable wheels for serious trips.
- Lower pressure to 18–20 psi on sand or snow; reinflate before highway return.
- Carry recovery gear: kinetic rope, soft shackles, traction boards, and a 12V compressor. The G63’s front tow hooks are rated for 8,000 lb static pull.
- Respect the environment. Stay on designated trails; the G63’s weight (near 3 tons) crushes fragile desert cryptobiotic soil instantly.
Exterior Design Updates
The 2025 G63 is visually indistinguishable from the 2024 at 20 paces. Changes are limited to:
- Grille: Double horizontal louvers in high-gloss black with red AMG badging (standard) or optional chrome.
- Front bumper: Larger corner air intakes for brake cooling; optional carbon-fiber trim.
- Wheels: New 22-inch forged cross-spoke (code 799) in matte black or titanium grey; 21-inch AMG multi-spoke standard.
- Paint: Manufaktur palette adds Spectral Blue Magno, Olive Green Magno, and Sunset Orange Metallic—each a $14,500 option.
2025 G63 AMG showing revised grille, 22-inch forged wheels, and optional matte Magno paint.
Image source: netcarshow.com
Interior, Comfort & Technology
MBUX Infotainment & Connectivity
The dual 12.3-inch screens (instrument cluster + central touchscreen) run MBUX generation 2 on a Qualcomm Snapdragon Cockpit Platform. Features include:
- Zero-layer UI: Critical functions (navigation, phone, media) surface contextually without menu diving.
- Augmented-reality navigation: Live camera feed overlays turn arrows on the central screen.
- Wireless Apple CarPlay / Android Auto with simultaneous Bluetooth phone pairing.
- OTA updates for maps, system software, and even new drive-mode calibrations.
- Mercedes me connect app: Remote lock/unlock, preconditioning, vehicle status, and geo-fencing alerts.
A minor gripe: the touchscreen lacks physical volume/knob redundancy; adjusting fan speed while bouncing on a washboard trail is frustrating.
Driver-Assistance Systems
Standard Driving Assistance Package bundles:
- Active Distance Assist DISTRONIC (adaptive cruise with stop-and-go)
- Active Steering Assist (lane centering up to 130 mph)
- Active Lane Change Assist (tap signal to change lanes automatically)
- Evasive Steering Assist & Crosswind Assist
- Traffic Sign Assist with automatic speed-limit adoption
Optional ($2,300) Active Parking Assist with 360° Camera adds perpendicular/parallel auto-park and a “transparent hood” view stitching four cameras for rock placement.
Seating Configurations & Cargo
| Configuration | Seating | Cargo Behind 2nd Row | Cargo Behind 1st Row |
|---|---|---|---|
| Standard | 5 (2+3) | 38.1 cu ft (1,080 L) | 68.6 cu ft (1,942 L) |
| Optional 3rd Row | 7 (2+3+2) | 12.4 cu ft (351 L) | 55.2 cu ft (1,563 L) |
The third row is strictly for children or very short adults—legroom is 26.4 in. Folding the second row flat requires removing head restraints (a two-handed job). For family hauling, a Toyota RAV4 XLE Premium offers more practical space at a fraction of the price.
Fuel Economy, Emissions & Sustainability
The EPA rates the 2025 G63 at 14 city / 18 highway / 16 combined mpg—a 1 mpg combined gain over 2024. Real-world mixed driving typically yields 13–15 mpg. The 48V system’s contribution is measurable but modest; the G63 remains a heavy, brick-shaped vehicle with a large-displacement V8.
Fuel requirement: Premium unleaded (91 RON minimum) is mandatory. Using regular risks detonation, reduced output, and potential long-term engine damage. For a deeper dive on why Mercedes specifies premium and what happens if you don’t, see our coverage of premium fuel requirements, which models need premium, alternatives to premium gasoline, and the pros and cons of regular gas.
Mercedes claims up to 15% lower CO₂ versus the prior non-hybrid V8, aided by:
- Engine-off coasting (up to 100 km/h)
- Regenerative braking
- Electric auxiliary systems (A/C compressor, water pump, power steering)
Cabin materials include DINAMICA microfiber (45% recycled polyester), organic cotton/wool blends on door panels, and bio-based polyurethane foam in seats. The Graz plant runs on 100% renewable electricity.
Pricing, Trims & Options
| Trim / Package | MSRP (USD) | Key Inclusions |
|---|---|---|
| G63 AMG Base | $156,450 | 21″ wheels, Nappa leather, Burmester 3D sound, MBUX, Driving Assistance Pkg |
| AMG Night Package | $3,200 | Blacked-out grille, mirrors, window trim, exhaust tips |
| AMG Carbon Fiber Trim | $4,800 | Interior carbon-fiber inserts, carbon-fiber engine cover |
| Manufaktur Paint | $14,500 | Matte Magno or exclusive metallic finishes |
| Manufaktur Interior | $8,500–$18,000 | Exotic woods, diamond-quilt leather, contrast stitching, illuminated sills |
| Rear Seat Comfort Package | $2,900 | Heated/ventilated rear seats, power recline, neck warmers |
| AMG Driver’s Package | $2,500 | Top-speed limiter raised to 149 mph, AMG Driving Academy voucher |
A fully loaded G63 with Manufaktur paint, interior, carbon trim, and rear comfort eclipses $220,000. Dealer markups of $10k–$30k remain common in high-demand metros; ordering 4–6 months out avoids them.
Ownership Costs & Warranty
- Basic warranty: 4 years / 50,000 miles
- Powertrain warranty: 4 years / 50,000 miles
- Corrosion perforation: 4 years / unlimited miles
- Roadside assistance: 4 years / unlimited miles
- Prepaid maintenance (3 services): ~$1,850
- Estimated annual fuel cost (15k mi, 14 mpg, $4.20/gal premium): ~$4,500
- Insurance (full coverage, 40-year-old driver, CA): $3,200–$4,500/yr
First major service (40k mi): Spark plugs, brake fluid, transfer-case/differential fluids, air filters ≈ $2,200 at dealer. Independent AMG specialists charge 20–30% less. Budget $3,000–$4,000/year for maintenance/tires/brakes after warranty.
How the G63 Compares to Key Rivals
| Competitor | Base Price | Power | 0–60 | Off-Road Cred | Interior Quality |
|---|---|---|---|---|---|
| 2025 Mercedes-AMG G63 | $156k | 621 hp | 3.7 s | ★★★★★ (lockers, low range, portal axles*) | ★★★★★ |
| 2025 Land Rover Defender 130 V8 | $132k | 493 hp | 5.3 s | ★★★★☆ (air suspension, terrain response) | ★★★★☆ |
| 2025 BMW X7 M60i | $104k | 523 hp | 4.5 s | ★★☆☆☆ (no low range, no lockers) | ★★★★☆ |
| 2025 Lexus LX 600 F Sport | $115k | 409 hp | 6.0 s | ★★★★☆ (Torsen limited-slip, crawl control) | ★★★★☆ |
| 2025 Ford Bronco Raptor | $85k | 418 hp | 5.8 s | ★★★★★ (portal axles, 37s, Fox Live Valve) | ★★★☆☆ |
*G63 does not have portal axles; that’s the G550 4×4². G63 uses standard portal-less axles but compensates with lockers and geometry.
Bottom line: The G63 is the only vehicle here that combines supercar acceleration, genuine extreme off-road hardware, and hand-built ultra-luxury. If you need only two of those three, cheaper alternatives exist.
Frequently Asked Questions
What makes the 2025 G63 different from the 2024?
The 48V mild-hybrid system, updated MBUX software, new wheel designs, expanded Manufaktur options, and a 1 mpg combined fuel-economy gain. Mechanical hardware (engine, transmission, chassis, lockers) is unchanged.
How many people can the G63 seat?
Five standard; seven with the optional third-row bench ($3,500). Third row folds flat but does not stow into the floor.
Does the G63 require premium fuel?
Yes. 91 RON (95 RON in Europe) minimum. Lower octane triggers knock-retard protection, cutting power and risking carbon buildup. See our detailed analysis on Mercedes premium fuel requirements.
Is there a plug-in hybrid or EV G-Class coming?
Mercedes confirmed the EQG (electric G-Class) for 2025 European launch, 2026 US arrival. It uses four wheel-hub motors, 116 kWh battery, and simulated low-range via torque vectoring. No PHEV version is announced.
What’s the real-world fuel economy?
Expect 12–14 mpg city, 16–18 mpg highway. Towing, roof loads, large all-terrain tires, and cold weather drop figures further.
How reliable is the G63?
The M177 V8 and 9-speed are proven. Common issues: air-suspension compressor failures (≈50k mi), ISG coolant pump leaks (new for 2025), and occasional MBUX glitches fixed by OTA updates. J.D. Power 2025 reliability rating: 78/100 (above segment average).
Can I flat-tow (four-down) a 2025 G63?
No. The transfer case lacks a neutral position that disconnects the driveline. Tow only on a trailer.
Verdict: Should You Buy the 2025 G63 AMG?
Buy it if: You want a single vehicle that can embarrass sports cars at a stoplight, traverse the Rubicon Trail stock, and coddle passengers in hand-stitched leather while drawing stares at valet. The mild-hybrid tech adds civility without diluting character.
Look elsewhere if: You rarely leave pavement, need three usable rows, care about fuel costs, or want a lower-profile luxury SUV. A Defender 130 V8 or Lexus LX 600 delivers 90% of the presence for 70% of the price.
The G63 remains a singular proposition—part military vehicle, part AMG missile, part rolling art. If that contradiction excites you, the 2025 model is the most polished version yet. Schedule a test drive that includes both a highway on-ramp and a dirt fire road; the duality is the whole point.
Ready to configure yours? Visit the Mercedes-Benz USA G63 build tool to spec your ideal combination and locate dealer inventory.