Mercedes-Benz CLS-Class, C257 (USA / CAN)

Coolant capacity & service interval

Mercedes-Benz CLS-Class, C257 (USA / CAN) coolant capacity ranges from 3 to 14 liters. The service interval is 124000 miles or 120 months. The data covers 6 configurations.

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

TypeSpecifications
CLS 450, 257.358 (2018-2022)
  • Use: Normal
  • Capacity 12 liter
  • Change 124000 miles/ 120 months
  • CLS 450, 257.358 (2018-2022)
  • Intercooler
  • Use: Normal
  • Capacity 3 liter
  • Change 124000 miles/ 120 months
CLS 450 4MATIC, 257.359 (2018-2023)
  • Use: Normal
  • Capacity 12 liter
  • Change 124000 miles/ 120 months
  • CLS 450 4MATIC, 257.359 (2018-2023)
  • Intercooler
  • Use: Normal
  • Capacity 3 liter
  • Change 124000 miles/ 120 months
CLS 53 AMG 4MATIC+, 257.361 (2018-2022)
  • Use: Normal
  • Capacity 14 liter
  • Change 124000 miles/ 120 months
  • CLS 53 AMG 4MATIC+, 257.361 (2018-2022)
  • Intercooler
  • Use: Normal
  • Capacity 4 liter
  • Change 124000 miles/ 120 months

Additional Notes

  • The Mercedes-Benz CLS-Class C257 coolant service interval is uniform across all listed configurations at 124,000 miles or 120 months under normal use conditions, regardless of trim or drivetrain.
  • The CLS 450 (257.358) and CLS 450 4MATIC (257.359) share an identical main cooling system capacity of 12 liters, indicating no meaningful difference in primary circuit volume between the rear-wheel-drive and all-wheel-drive variants of the same engine family.
  • Both CLS 450 variants carry a separate intercooler circuit capacity of 3 liters, reflecting a dedicated secondary cooling loop for the turbocharged induction system that is serviced independently from the main circuit.
  • The CLS 53 AMG 4MATIC+ (257.361) has a main cooling system capacity of 14 liters, which is 2 liters greater than the CLS 450 variants, consistent with the higher thermal demands of the AMG-tuned inline-six engine.
  • The intercooler circuit on the CLS 53 AMG 4MATIC+ holds 4 liters, one liter more than the 3-liter intercooler circuit found on the CLS 450 variants, again reflecting the greater heat rejection requirements of the AMG powertrain.
  • The 120-month interval on coolant changes corresponds to a 10-year service life, which aligns with the extended-life formulations typically used in modern Mercedes-Benz cooling systems.
  • The CLS 450 4MATIC (257.359) specifications cover model years 2018-2023, while the CLS 450 (257.358) and CLS 53 AMG 4MATIC+ (257.361) specifications cover 2018-2022, meaning the 4MATIC variant has an additional model year represented in the data.
  • The separation of main cooling system and intercooler circuit into distinct capacity entries means a full coolant service on any C257 configuration requires accounting for two separate fill volumes rather than a single combined figure.

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