Mercedes Classe G W463A (2018 – 2025)

Reliability score : 8.5/10

Launched in 2018, the W463A generation (often marketed under the W463 designation for historical reasons) marks the greatest evolution of the Classe G since its creation in 1979. While retaining its iconic cubic design, ladder frame, and three differential locks, it finally adopts an independent front suspension (double wishbone), rack-and-pinion steering, and a significantly widened and modernized cabin (integration of the dual screen, then the MBUX system). Road handling takes a giant leap, going from a rustic off-roader to a high-performance luxury SUV, although its brick-like aerodynamics still limit efficiency. In 2024, a facelift introduces mild-hybrid (MHEV) engines and a 100% electric version (G 580).

✅ Strengths

Transfigured road handling compared to the previous generation (independent front suspension)
Intact off-road capabilities (3 differential locks, low range)
Exceptional interior finish quality and significantly improved soundproofing
V8 engines (G 500 and G 63) with captivating character and sound
Extremely low depreciation (residual value among the highest on the market)

⚠️ Weaknesses

Gargantuan fuel consumption (especially with the petrol V8)
Very noticeable wind noise above 130 km/h (brick-like aerodynamics)
Rear seat space remains average despite the widening of the vehicle
Stratospheric maintenance, insurance, and tire costs (especially on AMG)
Windshield highly exposed to stone chips

🎯 Verdict

The Mercedes Classe G W463A is an automotive paradox: irrational, overpriced to buy and to run, but endowed with unparalleled charisma. In terms of reliability, this generation has corrected the dynamic wanderings of the past while retaining engines (notably the M176/M177 V8s and the OM656 diesel L6) that are particularly robust if maintained without sparing any expense. Buying a G 63 AMG or a G 500 is a highly recommendable passionate choice for those who can afford it, provided they scrupulously check the history, the condition of the windshield, and the application of the transfer case recall. The diesel (G 400 d) remains the most pragmatic choice for high mileage drivers.

Common issues

Problèmes électroniques et logiciels (infodivertissement, capteurs, aides à la conduite) Medium

🔧 Dès les premiers kilomètres – 80 000 km

💶 300 – 1 500 €

Vérifier le bon fonctionnement de tous les systèmes électroniques avant l'achat.

Usure prématurée des freins (disques et plaquettes, surtout sur les modèles AMG) Medium

🔧 30 000 – 60 000 km

💶 800 – 2 000 € (par essieu)

Prévoir un budget conséquent pour l'entretien des freins, surtout avec une conduite dynamique.

Fuites d'huile moteur ou de transmission (joints de couvre-culasse, carter, etc.) Medium

🔧 60 000 – 120 000 km

💶 500 – 1 500 €

Surveiller régulièrement les taches d'huile sous le véhicule et le niveau d'huile.

Dysfonctionnement des amortisseurs adaptatifs (AMG Ride Control, si équipé) High

🔧 80 000 – 150 000 km

💶 1 000 – 2 500 € (par amortisseur)

Tester le comportement de la suspension sur différentes surfaces et modes de conduite.

Estimated maintenance costs

Oil change	£200 – 350
Complete brakes	£700 – 1 700
Estimated annual budget	£1 000 – 2 200

Indicative estimates (independent garage, UK market). Prices vary by region and year.