How often should the antifreeze in a Mercedes-Benz car be replaced?
2 Answers
Mercedes-Benz car antifreeze generally needs to be replaced every 2 years or 40,000 kilometers, which is just a reference interval. For commercial vehicles with higher mileage, the replacement cycle should be shorter. Since driving conditions vary for each vehicle, the replacement should be based on actual usage. Check the antifreeze's condition; if it is found to be insufficient, replenish it promptly. If suspended particles, sediment, deterioration, or discoloration are observed in the antifreeze, it should be replaced immediately, and the system should be cleaned. Antifreeze replacement method: Before completely replacing the antifreeze, conduct a thorough inspection to check for any signs of leakage or cracks in the pipes, with particular attention to the five-way hose. The five-way hose is named for its five connecting interfaces that distribute antifreeze to different parts of the car. If there is any leakage of antifreeze in this section, replace the hose or re-secure the interface as needed. Drain the old antifreeze, then flush the liquid channels with clean water. Add clean water to the antifreeze reservoir and continue filling until water flows continuously through the engine cooling system. Then, start the engine and let it idle for 3 to 5 minutes to circulate the water. Initially, the water draining from the reservoir may have a faint pink tint. Continue adding clean water until the outflowing water is clear. Note: Remember to remove the heater hose and drain all water from the heater core. After draining for about an hour, add the new antifreeze through the radiator hose to allow it to flow quickly into the radiator. Then, add another container of antifreeze to the antifreeze reservoir until it is nearly full. Start the engine and let it run for about 10 minutes. During this time, as some air is expelled from the cooling system, the fluid level will drop. Add more antifreeze until it reaches the "MAXT" mark on the reservoir.
As a frequent Mercedes-Benz owner, I've summarized that the coolant replacement interval is generally every two years or around 25,000 kilometers, depending on the vehicle manual as different Mercedes models may have varying recommendations. Coolant not only prevents freezing but also protects against rust and dissipates heat. Prolonged neglect causes additive degradation, leading to engine component corrosion and increased repair costs. For example, vehicles driven frequently on highways or in extremely cold regions should be serviced earlier. The inspection method involves checking if the fluid level is within the normal range - replace immediately if the color turns cloudy. During each maintenance, I have technicians test the pH value to ensure effectiveness. While genuine Mercedes coolant is preferable, compatible aftermarket brands are acceptable. Regular maintenance safeguards engine health, prolongs lifespan, and ensures peace of mind.
