Germany, of all, clarified that all cars that are registered and individually approved after November 2024 have to fulfill the full set EU regulations. Previously, only the regulations of the respective member state had to be fulfilled. Those are mostly from the 60s to 80s and very lax.

Solange du vor Erhalt der Mahnung überwiesen hast, ist diese normal gegenstandslos. Ich bin aber kein Anwalt.