What is correct in this situation?

This sign indicates a change in the built-up area status. The upper part showing "Schotten 6 km" signifies that the built-up area for Schotten begins ahead. The lower part displays "Wilster" crossed out, indicating that you are leaving the built-up area of Wilster.

In German traffic regulations, entering a new built-up area typically involves different speed limits and driving conditions compared to rural areas. Understanding such signs is crucial as they inform drivers about changes that may affect their speed and road behavior, helping to ensure safety on the roads.