Whoops, seems I've been raising dust today.
The situation is, that I've gathered ~250 hours overtime meanwhile and I thought that it would be nice if I got paid them out partly.
I chatted about that with my team leader and what possibilities I could have if I asked our department leader about that.
What complicates the stuff is that I found a paragraph in my collective contract which states that I can press on all hours over 154 to be paid.
My team leader then chatted with my department leader along the way and aparently there is some movement in the company to get somehow rid of the overtime hours, but long time comp time is not the ultimate solution...