How can you tell when you need to bring your vehicle in for its next vehicle roadworthiness test?

Your answer is correct. In Germany, the date for the next vehicle roadworthiness test (Hauptuntersuchung) is indicated in two main ways. First, the inspection tag (plakette) on the rear license plate visually shows the month and year when the test is due next. Second, the registration certificate Part I (Zulassungsbescheinigung Teil I) includes an official entry specifying the deadline for the next inspection. The operating manual does not contain this legally binding information. Using the inspection tag and registration certificate ensures you keep track of when your vehicle must be inspected to maintain roadworthiness and comply with legal regulations.