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The 2003 Mercedes Benz C240 is designed to use Zerex Yellow 50/50 antifreeze engine coolant with a capacity of approximately 9 quarts. Coolant plays a crucial role in transferring heat to prevent engine damage from freezing or overheating. It is essential for safeguarding both metallic and non-metallic components within the engine and the cooling system. The average cost for a coolant replacement on your Mercedes falls between $60 and $70. It is recommended to have your coolant changed every 30,000 miles. If you observe consistently high temperature readings or frequent engine overheating, these are indicators that your vehicle may require a coolant flush. Addressing this issue promptly can prevent more severe and expensive problems down the road.
Peak's OET antifreeze and engine coolant, specifically the PEBOB3 formula, is a highly recommended option for use in a 2003 Mercedes Benz C240.