[DE] Line 4330 tourist service

The section of this line from Stockach to Mengen - currently marked as freight traffic only - does see seasonal tourist service as well.

For reference: https://www1.bwegt.de/land-und-leute/das-land-erleben/ausflugsziele/detail/bahn-nvbw-bwegt/freizeitexpress-biberbahn/6ac3ce60-c863-4ec3-a99b-9120c94e4451