Genuine OEM Mercedes-Benz Spark Plug, part number A0031599403. This component is essential for igniting the air-fuel mixture within the engine cylinders, initiating the combustion process. As a platinum type, it offers enhanced durability and consistent performance. The precise electrode gap and material composition ensure reliable spark generation for optimal engine power and efficiency. Genuine OEM spark plugs are manufactured to exact specifications to guarantee correct heat range, electrode projection, and electrical characteristics for the specific engine application.