This radiator overflow tank is a genuine OEM part for Mercedes-Benz 126 500 1549 W126 models from 1985. It is designed to fit perfectly and comes with all the necessary bolts for installation. The tank is made of high-quality plastic and has been leak-tested to ensure there are no defects. This coolant expansion tank is a vintage part from Germany and is not suitable for universal fitment or performance upgrades. It is a 100% leak-tested part and does not require any drilling or modifications for installation. Get your hands on this rare and authentic Mercedes-Benz part today!