Maybe it's the same as with TÜV? There are other companies that offer the mandatory recurring technical inspection of your car ("Hauptuntersuchung"), e.g. https

Maybe it's the same as with TÜV? There are other companies that offer the mandatory recurring technical inspection of your car ("Hauptuntersuchung"), e.g. https://en.wikipedia.org/wiki/Dekra https://en.wikipedia.org/wiki/Dekra, but "TÜV" has become synonymous with the process itself...