What are the most common Mercedes-Benz G-Class problems?
According to Au7o's analysis of 730+ owner reports, the 2025 Mercedes-Benz G-Class has 4 documented issues. The most frequently reported are: M177 4.0L Twin-Turbo V8 Excessive Oil Consumption and Cylinder Scoring, 9G-Tronic / AMG Speedshift Harsh or Jerky Shifting Requiring Adaptation, COMAND/MBUX Infotainment System Freeze and Reboot. Of these, 1 is rated critical and should be addressed promptly.
Is the Mercedes-Benz G-Class reliable?
The 2025 Mercedes-Benz G-Class has 4 known issues documented across 730+ owner reports. 1 issue is rated critical: M177 4.0L Twin-Turbo V8 Excessive Oil Consumption and Cylinder Scoring. Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.
How much does it cost to fix common Mercedes-Benz G-Class problems?
Repair costs for known Mercedes-Benz G-Class issues range from $300 to $18,000, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, M177 4.0L Twin-Turbo V8 Excessive Oil Consumption and Cylinder Scoring, typically costs $300-$18,000 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.
What is the 2019-2025 Mercedes-Benz G-Class M177 4.0L Twin-Turbo V8 Excessive Oil Consumption and Cylinder Scoring?
The 4.0L biturbo M177 V8 in the W463A G 550 and AMG G 63 is documented for above-normal engine oil consumption (often 1 quart per ~1,000-2,000 miles in worse cases), with the most severe outcome being cylinder bore/liner scoring and piston ring wear at higher mileage. The high-ou… Repairs typically run $300-$18,000. Severity: high.
What is the 2019-2025 Mercedes-Benz G-Class 9G-Tronic / AMG Speedshift Harsh or Jerky Shifting Requiring Adaptation?
W463A G-Class models (G 550 with 9G-Tronic 725.0, AMG G 63 with AMG Speedshift TCT 9G) are reported for harsh, jerky, or hesitant gear changes - notably a sudden jolt on certain up/downshifts and shudder at low speeds in stop-and-go traffic. The wet-clutch take-up element and lea… Repairs typically run $300-$2,500. Severity: medium.
What is the 2013-2025 Mercedes-Benz G-Class COMAND/MBUX Infotainment System Freeze and Reboot?
Both the older COMAND NTG5 system and the newer MBUX system in the G-Class experience random freezes, black screens, and spontaneous reboots. The harsh vibration environment of the G-Class body-on-frame chassis may contribute to connection issues at the head unit. Navigation, aud… Severity: low.
What is the 2019-2025 Mercedes-Benz G-Class Door Hinge Sag on Heavy Doors?
The W463A G-Class retains the iconic side-hinged doors which are significantly heavier than conventional doors due to their construction. The door hinges and check straps wear prematurely, causing the doors to sag and become difficult to close properly. The driver door is most co… Repairs typically run $400-$1,200. Severity: low.
