Valve Adapter
WARNING: This page is about a different car, the 2014 Volkswagen Touareg, 2013 Volkswagen Touareg, 2012 Volkswagen Touareg, and 2011 Volkswagen Touareg. However, it is still accessible from the selected car via links, so may be relevant.
A - 5/8"-18 UNF thread for conical seal
B Internal Threads With Valve Opener M 10 x1.25 VAG1785/9 (For Connections With Valve On High Pressure Side) M 12 x1.5 VAG1785/10 (For Connections On Low Pressure Side) -
NOTE:
A Schrader valve is screwed into connection -A-.
A valve opener must be installed in the charging hose connection.