Mercedes-Benz Mercedes-AMG GT, C192 (USA / CAN)

Additional Notes

• The Mercedes-AMG GT C192 (USA/CAN) coolant service intervals are rated for normal use conditions, with a change interval of 124,000 miles or 120 months across all listed configurations.
• 120 months equals a 10-year service interval, placing the coolant change schedule among the longer-cycle maintenance items typical of modern sealed or semi-sealed cooling systems.
• The Mercedes-AMG GT 55 AMG 4MATIC+ (192.380) carries a primary cooling system capacity of 12.3 liters, a volume consistent with a full-system service fill rather than a partial drain-and-refill procedure.
• A secondary cooling circuit on the 192.380 holds 7.3 liters, bringing the combined coolant volume for that variant to 19.6 liters across both circuits.
• The GT 63 AMG 4MATIC+ (192.378) shares the identical primary cooling system capacity of 12.3 liters, matching the 192.380 figure exactly despite being a separate engine variant.
• The secondary cooling circuit on the 192.378 also holds 7.3 liters, meaning the total combined coolant volume of 19.6 liters is consistent across both the 55 and 63 AMG variants.
• The presence of a dedicated secondary cooling circuit on both variants indicates a supplemental thermal management loop, commonly used in high-output applications to manage heat from components such as charge air coolers or power electronics separately from the main engine circuit.
• The 124,000-mile change interval applies uniformly to both the primary and secondary circuits on all listed configurations, meaning neither circuit carries a shorter or more frequent service requirement than the other.