Adapter for connection of additional filtration system with pressure relief valve and filter clogging indicator, used only in wet DSG CVTs of all manufacturers.
Transmission Fluid Oil Filling Adapter Tool for Audi VW Benz ATF DSG CVT 09G 01J | eBay
7416 - ATF Filling Adapter - VW, Audi DSG 24 x 1.5 — CTA Manufacturing
Transmission Oil Filling Change Adapter Professional Oil Filling Hose Change Adapter Auto Accessories for Audi DSG Gearbox