How Often Should Mercedes-Benz Antifreeze Be Replaced?
1 Answers
Mercedes-Benz vehicle antifreeze generally needs to be replaced every 2 years or 40,000 kilometers. This 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 actual replacement schedule should be determined based on usage. Regularly check the antifreeze condition—if levels are low, replenish promptly. If suspended particles, sediment, or discoloration are observed, replace the antifreeze immediately and flush the system. Antifreeze Replacement Procedure: Before a complete antifreeze replacement, conduct a thorough inspection for leaks or cracks in all hoses, with special attention to the five-way connector pipe (named for its five connection points distributing antifreeze to different parts of the vehicle). If leaks are found at this component, replace the hose or reseal the connections as needed. Drain the old antifreeze, then flush the channels with clean water. Fill the coolant reservoir with water and let it circulate continuously through the engine cooling system. Idle the engine for 3-5 minutes to facilitate circulation. Initially, the drained water may appear slightly pink; continue flushing until the outflow runs clear. Remember to disconnect the heater hose and drain the heater core completely. Approximately one hour after draining, pour new antifreeze into the radiator hose for rapid filling. Then add another batch to the reservoir until nearly full. Run the engine for about 10 minutes—as air escapes from the system, the fluid level will drop. Top up to the "MAXT" mark on the reservoir.
