How often should the antifreeze in a Mercedes-Benz be replaced?
1 Answers
Mercedes-Benz vehicles generally require antifreeze replacement 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 level and top it up if insufficient. If suspended particles, sediment, or discoloration are observed in the antifreeze, replace it immediately and flush the system. Antifreeze replacement procedure: Before a complete antifreeze change, conduct a thorough inspection of all hoses for leaks or cracks, with special attention to the five-way connector pipe (named for its five connection points distributing antifreeze to different vehicle components). If any leakage is detected at this component, replace the hose or reseal the connection as needed. Drain the old antifreeze and flush the channels with clean water. Fill the coolant reservoir with water and continuously circulate it through the engine cooling system. Let the engine idle for 3-5 minutes to circulate the water. Initially, slightly pinkish water will flow out - continue flushing until the outflow runs clear. Remember to disconnect the heater hose to fully drain the heater core. Approximately one hour after draining, add new antifreeze through the radiator hose for rapid filling. Then pour another batch into the reservoir until nearly full. Run the engine for about 10 minutes - as air escapes from the cooling system, the fluid level will drop. Top up the antifreeze to the "MAXT" mark on the reservoir.
