Unimog (MB) 425

Coolant capacity & service interval

The Unimog 425 uses coolant with a capacity of 20 liters. The coolant should be changed every 36 months. The data covers 2 configurations of the model.

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

TypeSpecifications
U 1300, 1500 (425) (1982-1992)
  • Use: Normal
  • Capacity 20 liter
  • Change 36 months
U 1300 (425) (1976-1984)
  • Use: Normal
  • Capacity 20 liter
  • Change 36 months

Additional Notes

  • The Mercedes-Benz Unimog 425 cooling system holds 20 liters across both the U 1300 (1976-1984) and U 1300/1500 (1982-1992) configurations, a volume consistent with the demands of heavy-duty commercial vehicle engines requiring substantial thermal management.
  • A 36-month change interval applies to the cooling system under normal use conditions for both configurations, meaning the interval is tied to calendar time rather than mileage or operating hours alone.
  • The U 1300 and U 1500 variants sharing the same 20-liter capacity and 36-month interval within the 1982-1992 row indicates that despite the addition of the U 1500 designation, no differentiation in coolant volume or service timing was specified between the two models in that period.
  • The overlap between the U 1300 (1976-1984) row and the U 1300/1500 (1982-1992) row means the U 1300 appears in specifications spanning from 1976 through 1992, with identical capacity and interval figures maintained throughout.

Other Systems