Unable to answer "What height limit is indicated here?" – Service Road – https://osm.org/way/104845747 via StreetComplete 57.4:

No ceiling, no need for height limit. However, there are 6 roads perpendicularly with a ceiling, no indicated height limit.

Attached photo(s):
https://westnordost.de/p/215359.jpg
https://westnordost.de/p/215360.jpg