How often should the Mercedes-Benz engine coolant be changed?

2 Answers
DelOscar
07/24/25 9:00am
Mercedes-Benz engine coolant should be changed every two years or every 40,000 kilometers. Introduction to the engine: An engine (Engine, motor) is a machine that can convert other forms of energy into mechanical energy, including internal combustion engines (such as gasoline engines), external combustion engines (such as Stirling engines, steam engines), electric motors, etc. Structure of the engine: The engine block is the framework of the engine and serves as the installation base for all the mechanisms and systems of the engine. It houses all the main components and accessories of the engine, both internally and externally, and bears various loads. Therefore, the engine block must have sufficient strength and rigidity. The engine block assembly mainly consists of components such as the cylinder block, cylinder liner, cylinder head, and cylinder gasket.
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ElizaLynn
08/11/25 4:28am
As a Mercedes-Benz owner who has driven several models, I feel the frequency of changing the engine coolant depends on the manual and driving conditions. Generally, it should be checked and replaced every two years or after running about 30,000 kilometers. Over time, the coolant deteriorates, and its anti-corrosion effect weakens, which may lead to engine overheating, especially during high-speed driving in summer. I usually ask the 4S shop to check it during each maintenance service and also inquire about the new long-life coolants that last longer. Regular replacement not only ensures safety but also avoids the hassle of major repairs. For high-performance models like AMG, the requirements might be stricter. In short, don’t wait until a problem occurs to panic.
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