How often should the antifreeze in a Mercedes-Benz be replaced?
3 Answers
Mercedes-Benz recommends replacing the antifreeze every 40,000 kilometers or 2 years. Antifreeze, also known as engine coolant with antifreeze properties, serves to prevent the coolant from freezing during cold winter parking, which could otherwise cause the radiator to crack or damage the engine cylinder block or head due to expansion. Taking the Mercedes-Benz C-Class 2021 model as an example, its body dimensions are: length 4784mm, width 1810mm, height 1457mm, with a wheelbase of 2920mm. The Mercedes-Benz C-Class 2021 is equipped with a 1.5T turbocharged engine, delivering a maximum power of 115kW and a maximum torque of 250Nm, paired with a 9-speed automatic transmission.
I've been driving a Mercedes for many years, and coolant replacement is no small matter. Generally, it's recommended to change it every two years or 40,000 kilometers, but it depends on the specific model and driving habits. For example, my C-Class doesn't get much city driving, so changing it every two years is sufficient. Aged coolant loses its anti-corrosion properties, which can lead to engine and radiator damage, with repair costs potentially reaching thousands of yuan. Regularly checking the fluid level and color changes is crucial—if it becomes cloudy, it should be replaced early. Before long trips, I always test the freezing point myself, keeping it around -35 degrees for safety and peace of mind. I prefer using genuine coolant to match performance specifications and take the opportunity to flush the entire cooling system to prevent clogging issues. Remember, timely replacement can extend your car's lifespan and reduce the risk of breakdowns.
I recently purchased a Mercedes-Benz A-Class and have been concerned about the coolant issue. I asked the 4S dealership, and they recommended changing it every 24 months or 30,000 kilometers, costing about 500 RMB. You can do it yourself, but you must wait for the engine to cool down to avoid burns. When changing, check the freezing point with a test strip—it's very simple. If the concentration is too high or too low, it will affect the freezing point. Coolant protects the engine from freezing or overheating, making it crucial in both winter and summer. I've learned to regularly check the fluid level and top it up with distilled water if it's low. Long-life coolant lasts longer, but don’t skimp or cut corners—regular maintenance is better. After changing, start the engine to check for leaks and ensure everything is normal to avoid costly repairs later.
