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The type of oil recommended for the 2009 Mercedes CLK 350 depends on the temperature of the vehicle's location. For any temperature, it is advised to use an oil viscosity of either 0W-30 or 0W-40. If the temperature is above -13F, it is recommended to use 5W-30, 5W-40, or 5W-50. For temperatures above -4F, opt for 10W-30, 10W-40, 10W-50, or 10W-60. If the temperature is above 5F, use 15W-30, 15W-40, or 15W-50. For temperatures above 23F, go for 20W-40 or 20W-50. The oil capacity for this vehicle is 8.5 US quarts with a filter. Remember to follow the oil change schedule outlined in your owner's manual to keep your car in optimal condition.
For a 2009 Mercedes-Benz CLK350, it is advised to use 5w-30 synthetic motor oil.
The optimal choice for a 2009 Mercedes Benz CLK350 is M5w-30 motor oil.