Genuine OEM Mercedes-Benz Oil Separator Gasket Ring, part number A0000170300. This gasket is essential for creating a tight seal between the oil separator and its housing, preventing any leakage of oil or crankcase pressure. It is typically made from a durable, oil-resistant material. Genuine OEM gaskets are vital for maintaining the integrity of the oil separation system, ensuring no oil escapes and maintaining proper engine lubrication and emissions control.