Link Mesh from Libary and override its materials?

I have encountered a deadend :smiley:

The situation is:
rendertemplate, containing materials and light and static camera setup.
I link this template to the blend with the mesh, apply the linked materials and link the scene with the light and camera as setup.

Now i need this mesh in another .blend with other materials.
I would like to link the mesh from the first blend into the new blend and then apply the materials from this scene, so the mesh changes in this blend if i change it in the other blend…

sounds quite confusing, but is rather simple. is there any way?