Genuine OEM Mercedes-Benz Spark Plug, part number A004159180326. This spark plug is essential for igniting the fuel-air mixture within the engine's combustion chamber, initiating the power stroke. It is a critical component for engine performance and efficiency. Manufactured to precise standards for reliable ignition and optimal engine performance. Genuine OEM parts ensure correct heat range and electrode gap for your specific engine, contributing to smooth running and fuel economy.