The Mercedes-Benz 0039979647 is a genuine OEM radial shaft seal, also known as a Simmerring or oil seal, specifically designed for the rear axle of MB-Trac agricultural tractors. This high-quality seal ensures optimal performance and prevents lubricant leakage, crucial for maintaining the integrity of the rear axle system. It features precise dimensions of 95mm inner diameter, 120mm outer diameter, and 12mm width, making it a perfect fit for various MB-Trac models including the 700, 800, 900, 1000, 1100, 1300, 1500, 1600, and 1800 series.