Genuine OEM Mercedes-Benz Additional Water Pump, part number A0005001986. This electric pump plays a vital role in circulating coolant, particularly when the main engine is off or at low speeds, ensuring optimal engine temperature is maintained and preventing overheating. As a genuine OEM component, it is engineered for precise flow rates and durability. Using genuine Mercedes-Benz parts guarantees the correct performance and longevity of your cooling system.