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

Brake fluid capacity & service interval

Mercedes-Benz GLS-Class, X167 (USA / CAN) uses brake fluid with a capacity of 0,8 liter. The service interval for fluid replacement is 24 months. The data covers 6 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- )
  • ABS
  • Use: Normal
  • Capacity 0,8 liter
  • Change 24 months
  • GLS 580 4MATIC, 167.985 (2023- )
  • ABS
  • Use: Normal
  • Capacity 0,8 liter
  • Change 24 months
  • GLS 450 4MATIC (M256.930), 167.959 (2019- )
  • ABS
  • Use: Normal
  • Capacity 0,8 liter
  • Change 24 months
  • GLS 580 4MATIC, 167.980 (2019-2023)
  • ABS
  • Use: Normal
  • Capacity 0,8 liter
  • Change 24 months
  • GLS 63 S AMG 4MATIC+, 167.989 (2019- )
  • ABS
  • Use: Normal
  • Capacity 0,8 liter
  • Change 24 months
  • Maybach GLS 600 4MATIC, 167.987 (2019- )
  • ABS
  • Use: Normal
  • Capacity 0,8 liter
  • Change 24 months

Additional Notes

  • The Mercedes-Benz GLS-Class X167 brake fluid capacity of 0.8 liter applies uniformly across all listed configurations, covering the GLS 450 4MATIC, GLS 450 4MATIC+, GLS 580 4MATIC, GLS 63 S AMG 4MATIC+, and Maybach GLS 600 4MATIC variants.
  • A 0.8 liter figure for a hydraulic brake system with ABS represents a service fill capacity, meaning the volume required to replenish or replace fluid within the existing system rather than the total volume of a fully dry overhaul.
  • The 24-month change interval is a time-based service cycle tied to normal use conditions. Brake fluid absorbs moisture over time through a process called hygroscopic absorption, which lowers the fluid's boiling point and reduces braking performance, making periodic replacement necessary regardless of mileage.
  • The GLS 450 4MATIC (M256.930) and the GLS 450 4MATIC+ (M256.830) carry different engine designations, reflecting a distinction between the standard inline-six and a mild-hybrid or updated variant, yet both share the same 0.8 liter brake fluid capacity and 24-month service interval.
  • The GLS 580 4MATIC appears under two separate chassis codes, 167.980 and 167.985, indicating a mid-cycle revision. Both share identical brake fluid specifications of 0.8 liter and a 24-month change interval under normal use conditions.
  • The Maybach GLS 600 4MATIC, despite occupying a distinct ultra-luxury sub-brand position with a different chassis code (167.987), carries the same brake fluid capacity and replacement interval as the standard and AMG X167 variants.

Other Systems