When must you switch on the hazard lights on your vehicle?

In German traffic regulations, using hazard lights serves to alert other drivers to potential hazards and abnormal situations.

You must switch on your hazard lights when your vehicle experiences a breakdown at a location where visibility is poor, as this warns other drivers about the obstruction. Additionally, if your vehicle is being towed, activating the hazard lights indicates to others that your vehicle is not operating normally, which is an important safety measure.

However, briefly double-parking does not require the use of hazard lights unless it poses a specific hazard to other road users, which is not the scenario stipulated in this question. Thus, it's crucial to identify the situations that genuinely warrant their use to ensure safety and compliance with traffic laws.