Mercedes-Benz GL-Class: Coolant
Important safety notes
The coolant is a mixture of water and antifreeze/corrosion inhibitor. It performs the following tasks:
• anti-corrosion protection
• antifreeze protection
• raising the boiling point
The engine cooling system is filled at the factory with coolant which contains an antifreeze/corrosion inhibitor that ensures protection down to approximately -35 °F (-37 °C ).
Only add coolant that has been premixed with the desired antifreeze protection.
Otherwise, the engine could be damaged.
Further information on coolants and on filling can be found in the Mercedes-Benz Specifications for Service Products, MB Approval 310.1, e.g. on the Internet at http://bevo.mercedes-benz.com. You can also consult an authorized Mercedes-Benz Center.
Always use a suitable coolant mixture, even in countries where high temperatures prevail.
Otherwise, the cooling system will not be sufficiently protected from corrosion, and the boiling point will be too low.
If the coolant has antifreeze protection down to -35 °F (-37 °C ), the boiling point of the coolant in the pressurized system is approximately 266 °F (130 °C ).
Your vehicle has a range of aluminum components. Use of aluminum components in the engine make it necessary to specifically match the antifreeze/corrosion inhibitor in these systems in order to protect the aluminum parts. Using other antifreeze/ corrosion inhibitors without these characteristics affects the service life.
The coolant must be used throughout the year in order to maintain the necessary corrosion protection and provide protection from overheating. In the Service Booklet, you can find information on the intervals for renewal.
The renewal interval is determined by the coolant type and the engine cooling system design. The renewal interval in the Service Booklet is only valid if the coolant is renewed or replenished with Mercedes-Benz approved products. Therefore, only use MB 326.0 antifreeze/corrosion inhibitor or another Mercedes-Benz approved product of the same specification.
Information on other products with the same specifications that are approved by Mercedes-Benz can be obtained at an authorized Mercedes-Benz Center or on the Internet at http://bevo.mercedes-benz.com.
The coolant is checked at every maintenance interval at an authorized Mercedes-Benz Center.
The antifreeze/corrosion inhibitor concentration in the engine cooling system should:
• be at least 50%. This will protect the
engine
cooling system against freezing down to
approximately -35 °F (-37 °C ).
• not exceed 55% (antifreeze protection to
-49 °F [-45 °C ]); otherwise, heat will not
dissipate as effectively.
If the coolant level is too low, MB 326.0 antifreeze/corrosion inhibitor should be added. Have the engine cooling system checked for possible leaks.
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