2019 — 2024
2.9L I6 Turbo Diesel (OM656) - G350d
Diesel
Check the transmission software behavior by driving at low speeds in stop-start traffic. | Description: Some owners have noted the 9G-TRONIC transmission can be sensitive to software calibrations; ensure shifts feel smooth and responsive without hesitation.
Inspect the door seals and frame gutters after a heavy wash or rain. | Description: While the W463A is a massive improvement over the old shape, the upright windscreen and boxy A-pillars can occasionally lead to minor wind noise or seal settling; ensure no moisture ingress is present.
Operate the infotainment and COMAND/MBUX system through multiple menus while stationary. | Description: These electronics are feature-rich but complex; ensure the screen doesn't flicker and that all steering wheel touch-capacitive buttons respond on the first press.
Turn the steering wheel to full lock while reversing slowly. | Description: Listen for any abnormal groans from the steering rack or suspension bushings, as the heavy front end can place significant demand on these components over high mileage.
Usually marks the first major service interval where transmission fluid and differential oils are recommended to be inspected or replaced.
A common point where engine mount health should be evaluated, as the high-torque OM656 diesel can soften the rubber mounts over time.
Consider having the turbocharger intake path and DPF sensors checked to maintain optimal fuel efficiency and emissions health.
Strictly adhere to the 15,000km or 12-month engine oil service intervals using high-grade synthetic oil specifically formulated for Mercedes diesel engines.
Keep a close eye on the AdBlue levels, as the system is essential for the OM656 engine's compliance and long-term exhaust health.
Regularly clean and treat the rubber door seals with a silicone-based product to prevent sticking and maintain a quiet cabin environment.
Monitor the tyre wear patterns closely; given the weight of the G-Class, even slight alignment issues can lead to uneven wear quite quickly.
Ensure the air suspension/chassis components remain free of heavy mud or salt buildup after off-road excursions to prevent premature corrosion.
Estimated repair costs if issues arise
If the vehicle is used primarily for short city trips, the DPF may eventually require a forced regeneration or professional cleaning to maintain peak performance.
In cars of this age, it's common to consider the air suspension system as a wear item; eventually, the air bladders or pump may require replacement to keep the ride height level.
Due to the substantial mass of the G350, brake components will work harder than in a standard sedan, so it is wise to prepare for a full set replacement when the time comes.
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Disclaimer: This report is generated with the assistance of AI analysis based on verified automotive data. While we strive for 100% accuracy, enthusiasts should always conduct physical inspections and consult service records. View Full Disclaimer