What should you note about the classes C, C1, D and D1 driving licence?

The selected combination of answers is correct because:

1. The driving licence for classes C, C1, D, and D1 indeed has a maximum validity period of 5 years. This rule ensures that drivers maintain their ability to operate vehicles safely over time, as regular evaluations are important.

2. The option stating that an application can be made to renew the driving licence 6 months prior to the expiry is accurate. This time frame allows individuals to ensure their driving credentials are current and avoids any lapses in permission to drive.

3. Lastly, the end of the driving licence's validity period being indicated on the driving licence document is crucial for both the driver and enforcement authorities to monitor and comply with driving licence regulations actively.

Understanding the significance of these points helps drivers remain compliant with German traffic laws and emphasizes the importance of maintaining valid driving credentials for safe driving practices.