Mercedes-Benz G-Class, W463B (USA / CAN)
Coolant capacity & service interval
Mercedes-Benz G-Class, W463B (USA / CAN) coolant capacity ranges from 4,6 liters to 13,7 liters. The service interval is 124000 miles or 120 months. The data covers 4 configurations.
The configuration chart below lists fill volumes and service intervals for each engine and trim variant.
| Type | Specifications |
|---|---|
| G 550, 463.261 (2019-2024) |
|
|
|
| G 63 AMG, 463.277 (2019-2024) |
|
|
|
Additional Notes
- The G 550 (463.261) main cooling system holds 13 liters measured between the minimum and maximum marks on the reservoir, which reflects a service fill level rather than a total dry system volume.
- The G 63 AMG (463.277) main cooling system capacity is 13.7 liters between min and max, a modest increase over the G 550 figure that corresponds to the AMG variant's larger 4.0-liter biturbo V8 engine.
- Both the G 550 and G 63 AMG share an identical coolant change interval of 124,000 miles or 120 months under normal use conditions, placing the service cycle on a long-life schedule tied to whichever limit arrives first.
- The G 550 intercooler circuit carries a separate 4.6-liter coolant capacity, indicating a liquid-cooled charge air system that operates as a distinct loop from the main engine cooling circuit.
- The G 63 AMG intercooler circuit capacity is 6.6 liters, notably larger than the 4.6-liter figure for the G 550, reflecting the greater thermal demands of the AMG engine's twin-turbocharged configuration.
- The intercooler circuits on both variants follow the same 124,000-mile or 120-month change interval applied to the main cooling systems, meaning all four coolant circuits across both models align to a single service schedule under normal use conditions.