Staring in 2019, Mercedes Sprinter vans use two hinge types. You can option your van from the factory with either 180 or 270 degree hinges. Because of the way the hinges articulate, Owl gear can only be utilized with the 180 degree option.
If you have a VS30 (2019-Present) then you need to determine if you have 270˚ or 180˚ hinges. Revels and Storyteller vans all come with 180˚ hinges so you don't need to swap them. Please look at the image below. If you have 270˚ hinges then you need to add those to your order to mount Owl gear. The install is pretty straight forward. Please reference out "hinge swap" video to learn more. 