Panels Node template with additional arguments
You need a few components to make this work properly.


You View must have a display of type "Content pane".
A contextual filter.
In the Pane settings you should set your argument input to be "From context", and then picking an argument source that matches what your contextual filter wants. Most likely that will be a node id. (The argument setting could be a specific argument, first, second or so, as well, but that's generally not a very good idea)
Add the View pane to your panel page, not the View itself. If the Pane doesn't show up in the listing, your Pane settings are wrong.
Done.