Unimog (MB) 408, 418

Differential fluid capacity & service interval

Unimog (MB) 408 and 418 models utilize differential fluid with a capacity range of 2 to 2,5 liters. Service intervals include checking every 100 hours and changing every 1600 hours or 24 months. The data covers 6 configurations.

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

TypeSpecifications
  • U 110 (418) (1992-2000)
  • Front
  • Use: Normal
  • Capacity 2,5 liter
  • Check 100 hours
  • Change 1600 hours/ 24 months
  • U 110 (418) (1992-2000)
  • Rear
  • Use: Normal
  • Capacity 2,5 liter
  • Check 100 hours
  • Change 1600 hours/ 24 months
  • U 140 (418) (1992-2000)
  • Front
  • Use: Normal
  • Capacity 2,5 liter
  • Check 100 hours
  • Change 1600 hours/ 24 months
  • U 140 (418) (1992-2000)
  • Rear
  • Use: Normal
  • Capacity 2,5 liter
  • Check 100 hours
  • Change 1600 hours/ 24 months
  • U 90 (408) (1992-2000)
  • Front
  • Use: Normal
  • Capacity 2 liter
  • Check 100 hours
  • Change 1600 hours/ 24 months
  • U 90 (408) (1992-2000)
  • Rear
  • Use: Normal
  • Capacity 2 liter
  • Check 100 hours
  • Change 1600 hours/ 24 months

Additional Notes

  • The Unimog (MB) 408 and 418 series use hour-based service intervals for differential fluid, with checks scheduled at every 100 hours and changes due at 1600 hours or 24 months, whichever comes first.
  • The dual interval structure of 1600 hours or 24 months means a calendar-based limit applies alongside the operational hour count, so time elapsed can trigger a change even before the hour threshold is reached.
  • Front and rear differentials on the U 110 (418) share an identical 2.5-liter capacity, and both follow the same 100-hour check and 1600-hour/24-month change schedule under normal use conditions.
  • The U 140 (418) front and rear differentials also each hold 2.5 liters, matching the U 110 (418) specifications exactly across both axles and all service intervals.
  • The U 90 (408) carries a 2-liter capacity in both the front and rear differentials, which is 0.5 liters less per axle than the 418-series variants, reflecting a difference tied to the model designation rather than axle position.
  • Because front and rear differential capacities are equal within each variant, a full two-axle service on the U 90 (408) requires 4 liters total, while the same service on either 418-series variant requires 5 liters total.
  • The 100-hour check interval across all six configurations is a fluid level inspection point rather than a change interval, serving as a periodic verification between the longer change cycles.

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