Genuine OEM Mercedes-Benz Wheel Valve Nut, part number A0004016438. This part functions as a nut that secures the valve stem or tire pressure monitoring system (TPMS) sensor to the wheel. It is essential for maintaining an airtight seal and ensuring proper tire inflation. Made from durable materials to resist corrosion and maintain torque. Genuine OEM parts guarantee the correct thread pitch and sealing properties for wheel components.