The 53-3100 Vacuum Power Brake Booster is a OEM part specifically designed for Mercedes-Benz vehicles from 1998 to 2005. Made of steel and with a housing diameter of 9.83 inches and a diaphragm diameter of 9.55 inches, this brake booster comes with a booster, instruction sheet, and seal kits. It is guaranteed with a manufacturer warranty of 5 years and is a direct fit for Mercedes-Benz ML320, ML350, ML500, ML430, and ML55 AMG models. This brake booster is a high-quality, reliable component to enhance the braking system of your Mercedes-Benz vehicle.