Mercedes-Benz GL-Class, X166 (USA / CAN)

Brake fluid capacity & service interval

Mercedes-Benz GL-Class, X166 (USA / CAN) requires 0,8 liter of brake fluid. The service interval for the fluid is 24 months. The data covers 3 configurations.

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

TypeSpecifications
  • GL 350 BlueTEC 4MATIC, 166.824 (2011-2015)
  • ABS
  • Use: Normal
  • Capacity 0,8 liter
  • Change 24 months
  • GL 450 4MATIC, 166.872 (2011-2015)
  • ABS
  • Use: Normal
  • Capacity 0,8 liter
  • GL 550 4MATIC, 166.873 (2011-2015)
  • ABS
  • Use: Normal
  • Capacity 0,8 liter

Additional Notes

  • The Mercedes-Benz GL-Class X166 carries a brake fluid capacity of 0.8 liter across all three variants covered in the specifications, applying to the hydraulic brake system with ABS on the GL 350 BlueTEC 4MATIC, GL 450 4MATIC, and GL 550 4MATIC.
  • A 0.8 liter figure for a brake fluid system reflects a service fill quantity, meaning the amount used during a fluid exchange rather than a full system overhaul with component replacement.
  • Among the three variants, only the GL 350 BlueTEC 4MATIC (166.824) carries an explicit change interval of 24 months under normal use conditions.
  • A 24-month brake fluid change interval is consistent with moisture absorption characteristics of glycol-based brake fluids, which degrade over time regardless of mileage, making a time-based interval the standard measure.
  • The GL 450 4MATIC (166.872) and GL 550 4MATIC (166.873) share the same 0.8 liter capacity as the diesel variant, indicating uniform brake system volume across the 2011-2015 X166 lineup despite differences in engine configuration.

Other Systems