Mercedes-Benz GLS-Class, X167 (USA / CAN)

Coolant capacity & service interval

Mercedes-Benz GLS-Class, X167 (USA / CAN) uses coolant with a capacity range of 5 to 18,9 liters. The service interval for coolant is 124000 miles or 120 months. The data covers 10 configurations.

The configuration chart below lists fill volumes and service intervals for each engine and trim variant.

TypeSpecifications
GLS 450 4MATIC+ (M256.830), 167.959 (2023- )
  • Use: Normal
  • Capacity 18,9 liter
  • Change 124000 miles/ 120 months
GLS 580 4MATIC, 167.985 (2023- )
  • Use: Normal
  • Capacity 15,7 liter
  • Change 124000 miles/ 120 months
  • GLS 580 4MATIC, 167.985 (2023- )
  • Intercooler
  • Use: Normal
  • Capacity 5 liter
  • Change 124000 miles/ 120 months
GLS 450 4MATIC (M256.930), 167.959 (2019- )
  • Use: Normal
  • Capacity 18,9 liter
  • Change 124000 miles/ 120 months
GLS 580 4MATIC, 167.980 (2019-2023)
  • Use: Normal
  • Capacity 15,7 liter
  • Change 124000 miles/ 120 months
  • GLS 580 4MATIC, 167.980 (2019-2023)
  • Intercooler
  • Use: Normal
  • Capacity 5 liter
  • Change 124000 miles/ 120 months
GLS 63 S AMG 4MATIC+, 167.989 (2019- )
  • Use: Normal
  • Capacity 15,7 liter
  • Change 124000 miles/ 120 months
  • GLS 63 S AMG 4MATIC+, 167.989 (2019- )
  • Intercooler
  • Use: Normal
  • Capacity 5 liter
  • Change 124000 miles/ 120 months
Maybach GLS 600 4MATIC, 167.987 (2019- )
  • Use: Normal
  • Capacity 15,7 liter
  • Change 124000 miles/ 120 months
  • Maybach GLS 600 4MATIC, 167.987 (2019- )
  • Intercooler
  • Use: Normal
  • Capacity 5 liter
  • Change 124000 miles/ 120 months

Additional Notes

  • The Mercedes-Benz GLS-Class X167 coolant change interval is uniform across all listed variants at 124,000 miles or 120 months, whichever comes first, under normal use conditions.
  • 120 months equals ten years, making the time-based interval notably long and reflecting modern long-life coolant formulations designed to resist degradation over extended service periods.
  • The GLS 450 4MATIC with the M256.930 engine carries a cooling system capacity of 18.9 liters, the largest figure among all listed X167 variants, indicating a more expansive coolant circuit relative to the V8-powered models.
  • The GLS 580 4MATIC, GLS 63 S AMG 4MATIC+, and Maybach GLS 600 4MATIC each share a main cooling system capacity of 15.7 liters, despite differences in engine designation and vehicle positioning.
  • The GLS 450 4MATIC+ introduced with the M256.830 engine shares the same 18.9-liter cooling system capacity as the earlier M256.930 variant, with the change interval also remaining at 124,000 miles or 120 months.
  • The GLS 580 4MATIC, GLS 63 S AMG 4MATIC+, and Maybach GLS 600 4MATIC each carry a separate 5-liter intercooler circuit in addition to the main 15.7-liter cooling system, bringing the total coolant volume across both circuits to 20.7 liters for those variants.
  • The intercooler circuit on the GLS 580 4MATIC follows the same 124,000-mile or 120-month change interval as the main cooling system, meaning both circuits are serviced on the same schedule.
  • The GLS 580 4MATIC is listed under two separate chassis codes, 167.980 for 2019-2023 and 167.985 from 2023 onward, yet the cooling system and intercooler capacities remain identical between the two designations at 15.7 liters and 5 liters respectively.

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