Unimog (MB) 403, 406, 413, 416

Brake fluid capacity & service interval

Unimog (MB) 403, 406, 413, 416 models require 0,8 liter of brake fluid. The service interval for fluid replacement is 12 months. The data covers 3 configurations.

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

TypeSpecifications
U 900 (406), U 1100 (416) (1985-1992)
  • Use: Normal
  • Capacity 0,8 liter
  • Change 12 months
U 800 (403), U 800L (413) (1970-1992)
  • Use: Normal
  • Capacity 0,8 liter
  • Change 12 months
U 900 (406), U 1100 (416) (1970-1992)
  • Use: Normal
  • Capacity 0,8 liter
  • Change 12 months

Additional Notes

  • The hydraulic brake system capacity across all listed Unimog (MB) 403, 406, 413, and 416 variants is 0.8 liter, a figure that reflects a service fill volume for the hydraulic circuit rather than a component overhaul quantity.
  • The U 800 (403) and U 800L (413), covering model years 1970-1992, share an identical brake fluid capacity of 0.8 liter with a 12-month change interval under normal use conditions.
  • The U 900 (406) and U 1100 (416) for the 1970-1992 period carry the same 0.8 liter capacity and 12-month change interval, placing them on the same service schedule as the lighter 403 and 413 variants despite representing a higher model tier.
  • A separate specification entry exists for the U 900 (406) and U 1100 (416) covering 1985-1992, which retains the 0.8 liter capacity and 12-month change interval, indicating no revision to brake fluid service requirements for those models within that later production window.
  • The 12-month change interval applied under normal use conditions is notably short by general automotive standards, a characteristic common to brake fluid service schedules due to the fluid's hygroscopic nature, which causes moisture absorption over time and lowers the boiling point of the fluid.

Other Systems