What is recommended oil for Mercedes s class 320 cdi?

For the Mercedes S-Class 320 CDI, it is recommended to use synthetic engine oil that meets the Mercedes-Benz specifications, specifically MB 229.51 or MB 229.52. A common choice is a fully synthetic oil with a viscosity rating of 5W-40, which provides optimal protection and performance in various driving conditions. Always refer to the owner's manual or consult with a certified mechanic for the best recommendations tailored to your specific vehicle and driving conditions.