Genuine OEM Volkswagen Quick Release, part number 2Q0201600. This part enables a rapid and secure attachment or detachment of coolant system components. It is positioned as part 7 in the diagram. The quick release measures 0.035 meters in length, 0.022 meters in width, and 0.017 meters in height. Genuine OEM quick releases are manufactured to precise tolerances, ensuring a secure and leak-free seal for the coolant system.