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The Mercedes CLS 500 requires SAE 5w-40 full synthetic oil, holding 8 quarts including the filter. This oil helps to cool and lubricate the engine's internal components, preventing wear and damage from the parts rubbing together. The cost of an oil change for your Mercedes typically ranges from $60 to $70 for labor and $110 to $120 for parts. It is recommended to have an oil change every 10,000 miles or once a year. Signs while driving that indicate the need for an oil change include engine noise, ticking sounds, transmission problems, shaking at idle, and decreased fuel efficiency. External indications that an oil change is needed include smoke from the exhaust and oil leaks under your parked car.
The Mercedes CLS 500 is best suited for a full synthetic 5W-40 motor oil.