How do you add coolant in Mercedes c240?

To add coolant in a Mercedes C240, first, ensure the engine is cool to avoid burns. Open the hood and locate the coolant reservoir, typically marked with a cap labeled "Coolant." Remove the cap and add the appropriate type of coolant mixed with water (if necessary) until it reaches the recommended level indicated on the reservoir. Finally, securely replace the cap and check for any leaks before closing the hood.