Unimog (MB) 437

Coolant capacity & service interval

Unimog (MB) 437 uses coolant with a capacity of 18 liters. The service interval for the fluid is 36 months. The data covers 4 configurations.

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

TypeSpecifications
U 1350 L U 1500 (437) (1992-2001)
  • Use: Normal
  • Capacity 18 liter
  • Change 36 months
U 1800, 1850 L, 1850 L 38 (437) (1992-2001)
  • Use: Normal
  • Capacity 18 liter
  • Change 36 months
U 2450, 2450 L, 2450 L 38 (437) (1992-2001)
  • Use: Normal
  • Capacity 18 liter
  • Change 36 months
U 2150, 2150 L, 2150 L 38 (437) (1991-2001)
  • Use: Normal
  • Capacity 18 liter
  • Change 36 months

Additional Notes

  • The Unimog (MB) 437 cooling system capacity is 18 liters across all listed variants, which is a substantial volume consistent with heavy-duty commercial vehicle engines requiring large coolant reserves to manage sustained thermal loads.
  • The U 1350 L and U 1500 carry a 36-month coolant change interval under normal use conditions, paired with an 18-liter system capacity.
  • The U 1800, U 1850 L, and U 1850 L 38 share the same 18-liter capacity and 36-month change interval under normal use as the lighter U 1350 L and U 1500 variants.
  • The U 2150, U 2150 L, and U 2150 L 38 follow the same 18-liter capacity and 36-month normal-use interval, with a production window starting from 1991, one year earlier than most other variants in the 437 series.
  • The U 2450, U 2450 L, and U 2450 L 38 maintain the 18-liter capacity and 36-month change interval under normal use, consistent with the rest of the 437 lineup from 1992-2001.
  • A 36-month interval is a time-based rather than mileage-based service criterion, which is typical for coolant specifications in vehicles that may accumulate hours of operation unevenly or operate in stationary power applications, as is common with Unimog platforms.

Other Systems