For Models M274 W205 W213 X253 W212 M274 C300 E300. They operate stably under high-temperature and high-load conditions, making them ideal for users who want to ensure their vehicle's cooling system maintains optimal performance over the long term. This effectively prevents overheating or overcooling, improving fuel efficiency and engine life. Helps maintain optimal engine temperature efficiently. By regulating the amount of coolant in the radiator, the engine operates within the appropriate temperature range, reducing engine wear.