Hi together, I have been planning for some time to change the transmission oil on my Opel Movano B (built in 2016, L2H2, 110 hp, manual manual transmission). As far as I know, the PF6 transmission installed in the Movano has a hose with sockets, which can be filled with the transmission oil using a funnel (see attached pictures). Now the question arises: How do I get this socket opened? I have already tried to pull it, rotate it and in different directions It seems almost as if this is not a lid at all. Could it be that the stud only serves to vent the gearbox and can’t be opened at all? Does any of you have experience with it or an idea how to open it? Thank you in advance for your help!