What grade or oil to use for Mercedes e320?

For a Mercedes E320, it's generally recommended to use synthetic oil with a viscosity grade of 5W-30 or 0W-40, depending on the climate and driving conditions. Always check the owner's manual for specific recommendations, as it may vary by model year. Additionally, look for oils that meet the Mercedes-Benz approval standards, such as MB 229.5 or MB 229.51, to ensure optimal performance and engine protection.