The 2004 Mercedes-Benz G-Class is a body-on-frame luxury SUV known for its military-grade roots, upright styling, and serious off-road capability. It’s ideal for buyers who want a premium, hand-built feel with real 4x4 hardware, not just a soft-roader crossover experience. In 2004, the G-Class sits as a high-end, low-volume status SUV with classic design and strong resale appeal, especially in AMG form. This model year belongs to the long-running W463 generation, which received incremental updates over time rather than a single full redesign.

1) Engine options: Many 2004 G-Class models were sold as the G500 with a 5.0L V8, while the performance-focused G55 AMG used a hand-built AMG V8 (commonly listed as a 5.4L). Both emphasize torque-rich power delivery suited to the G’s weight and brick-like aerodynamics. 2) Full-time 4WD with locking differentials: A hallmark of the G-Wagen is its serious drivetrain, including full-time four-wheel drive and triple locking differentials (center, rear, and front) for traction in mud, snow, and rocky terrain. 3) Body-on-frame durability: Unlike many luxury SUVs, the 2004 G-Class uses a traditional ladder frame with a rugged suspension setup designed for off-road punishment and long-term structural toughness. 4) Premium cabin with classic ergonomics: Expect real leather, wood trim, supportive seating, and a high commanding driving position, plus the unmistakable upright windshield and excellent outward visibility. 5) Iconic design and aftermarket support: The G’s squared-off look is timeless, and there’s strong support for tires, wheels, lighting, and overland accessories—helpful for owners who want to personalize capability and appearance.

Shoppers often research 2004 Mercedes-Benz G-Class reliability because this SUV can be durable when maintained, but repairs can be expensive and some age-related failures are common. 1) Oil leaks from gaskets and seals: Owners frequently report oil seepage from valve cover gaskets, front/rear main seals, and other engine sealing points, often showing up around 80,000–130,000 miles depending on maintenance and climate. Leaks can be minor at first but should be addressed early to avoid mess, odors, and rubber component damage. 2) Suspension and steering wear: Given the G-Class weight and tall stance, wear items like control arm bushings, ball joints, and steering components can loosen over time, commonly becoming noticeable between 70,000–120,000 miles. Symptoms include clunks over bumps, vague steering, uneven tire wear, or highway wandering. 3) Electrical and convenience feature faults: The 2004 G-Class can develop issues with window regulators, central locking/door actuators, instrument cluster warnings, and aging wiring/grounds. These problems tend to appear as intermittent faults that can be time-consuming to diagnose, especially if the vehicle has seen water intrusion or prior aftermarket accessory installs. 4) Brake wear and vibration: The G is heavy and can be hard on brakes. Owners sometimes report faster pad/rotor wear and occasional brake vibration (warped rotors or uneven pad deposits), especially with city driving or towing. Regular inspections help prevent turning a routine service into a larger repair.