Unimog (MB) 408, 418

Clutch fluid capacity & service interval

Unimog (MB) 408 and 418 models utilize clutch fluid with a capacity of 0,2 liter. The service interval for fluid changes 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 110 (418) (1992-2000)
  • Use: Normal
  • Capacity 0,2 liter
  • Change 12 months
U 140 (418) (1992-2000)
  • Use: Normal
  • Capacity 0,2 liter
  • Change 12 months
U 90 (408) (1992-2000)
  • Use: Normal
  • Capacity 0,2 liter
  • Change 12 months

Additional Notes

  • All three configurations — the U 90 (408), U 110 (418), and U 140 (418) — share an identical clutch fluid capacity of 0.2 liter, which is a small volume consistent with a hydraulic clutch master and slave cylinder circuit rather than a large reservoir system.
  • The 0.2 liter figure represents a service fill capacity, meaning the amount of fluid held within the hydraulic clutch circuit during normal operation, not an overhaul or full system prime quantity.
  • Each configuration carries a 12-month change interval applied under normal use conditions, meaning the fluid replacement cycle is time-based rather than mileage- or hour-based.
  • The annual change interval for hydraulic clutch fluid reflects the hygroscopic nature of such fluids, which absorb moisture over time and degrade in boiling point and corrosion resistance regardless of how much the vehicle has been operated.
  • The specifications for the 1992-2000 period show no variation in either capacity or service interval across the U 90 (408), U 110 (418), and U 140 (418), despite the two series representing distinct model families.
  • All three rows are noted as hydraulic clutch systems, which distinguishes the clutch actuation method from mechanical cable-operated alternatives and explains why a fluid capacity and change interval are applicable.

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