Dell 105v doesn't pull paper

Hey community.

My dell 105v won't print because it can't pull in any paper. It only works on one side, so the paper is pulled on the left but nothing moves on the right side.

I've changed the paper, put in more and less, checked for a paper jam. Nothing worked out so far. Should I open and clean it? Is there a manual how to do it? Or is there any other trick to get it moving again?

Thanks in advance.