Mercedes-Benz Mercedes-AMG GT, C192 (EU)

Additional Notes

• The Mercedes-AMG GT C192 (EU) features two separate cooling circuits per variant: a primary cooling system and a secondary cooling system, each with its own distinct capacity figure.
• The primary cooling system on both the GT 55 AMG 4MATIC+ (192.380) and the GT 63 AMG 4MATIC+ (192.378) holds 12.3 liters, a volume consistent with a full system fill covering the engine block, cylinder head passages, and associated plumbing.
• The secondary cooling system on both variants carries 7.3 liters, a notably smaller but still substantial capacity that reflects a dedicated circuit separate from the main engine loop.
• All four cooling system entries share an identical service interval of 200,000 km or 120 months under normal use conditions, meaning the change schedule applies equally to both the primary and secondary circuits across both variants.
• The 120-month interval translates to a 10-year coolant replacement cycle, which is characteristic of modern long-life coolant formulations designed to maintain corrosion inhibitor effectiveness over extended periods.
• The capacity figures for the primary cooling system are identical between the GT 55 AMG 4MATIC+ and the GT 63 AMG 4MATIC+, at 12.3 liters, indicating no difference in primary circuit volume despite the two variants carrying different engine designations.
• Similarly, the secondary cooling system capacity of 7.3 liters is shared between both the 192.380 and 192.378 variants, with no variation recorded between the two configurations in the available specifications.