How often should the Mercedes-Benz engine coolant be changed?
3 Answers
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.
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.
From a maintenance perspective, the replacement interval for Mercedes-Benz engine coolant is typically set at every two years or upon reaching 30,000 to 40,000 kilometers. The primary reason is that the additives in the coolant degrade over time, compromising its cooling performance. Prolonged neglect may lead to corrosion and leakage in the water pump or radiator. I recommend that owners develop the habit of regularly opening the hood to inspect the coolant, checking for cloudiness or impurities in the fluid. Climate also affects the replacement cycle, with hotter regions like southern China requiring more frequent changes. It's best to use the Mercedes-Benz factory-specified coolant type to avoid issues from mixing different products. Performing this during minor maintenance services is cost-effective and helps prevent small issues from escalating into major problems.
