Mercedes ML320 Workshop Manuals and Repair Manuals

It is recommended to change the engine oil in your Mercedes ML320 every 7,500 miles or every 12 months, whichever comes first. Regular oil changes are essential for maintaining the engine's performance and longevity. Neglecting to change the oil as recommended can lead to increased wear and tear on engine components and potentially costly repairs.

The air filter in your Mercedes ML320 should be replaced approximately every 30,000 miles or every 3 years, depending on driving conditions and environmental factors. A clean air filter is vital for proper engine performance, as it prevents dust, debris, and contaminants from entering the engine intake. Neglecting to replace a clogged air filter can restrict airflow, reduce fuel efficiency, and potentially cause engine damage.

To ensure proper cooling system performance, it is crucial to use the recommended coolant for your Mercedes ML320, which is Mercedes-Benz coolant type "MB 325.0" or an equivalent. This coolant is specifically formulated to meet the requirements of your vehicle's engine and provides optimal protection against corrosion and overheating. Using the correct coolant will help maintain the engine's operating temperature within the recommended range and prevent potential damage.