Thanks for all your replies. I thought, I had alerst turned on for this post, but apparently I received nothing and I got distracted with other things and no reminders for answers incoming
Dave, you're of course right, if you don't know the area, you can't have a clue with the Saar waypoint from the profile and put it on the right place on the map. But you guessed right, I should have called it Mettlach instead of Saar, which is the river which passes through Mettlach.
The last part of the trail (Perl area) is indeed difficult to read, even on the official map of the trail. But it is a very windy trail there with lots of changes in direction and parts which are quite close to each other. I'll have to find a way to separate this better, although at the moment I am not sure how to do that. Smaller dots could help and maybe a helper line between the closer parts of the trail to highlight which part goes where.
Hans, I tried a shaded relief at first, but my attempts where not satisfying. The shaded relief made everything too grey and by adding the contours on top I had the feeling the map got too crowded with information and so I decided to take only the elevation contours since they were more important to me. I still need a good setup for hillshade creation, but it's on my list. My problem is not the creation itself, multidirectional, and even coloured hillshade (Imhof influenced) is possible, but I need to find a way to keep only those parts of the hillshade which are important, like eliminating those flat parts of the hillshade.