Creating a new account and adding a new listing is for free :-)
Steps:
1) First of all, create a new account
2) Then browse the directory and choose the right category for your listing
3) Click on the button "Add your listing here"
4) Write your data, name, address, phone, etc.
5) Submit
6) An administrator will review it and approve it in a few days.
Note: only listings in Munich and surrounding areas are accepted.