A motor vehicle with air brakes has not been used for several days. When may you set off at the earliest (vehicle fully loaded)?

In this scenario, a motor vehicle with air brakes must meet specific conditions before it can safely set off after being idle for several days.

Firstly, the signals for the pressure warning device must stop indicating that the braking system has adequate pressure to function. This is crucial because air brakes operate on a compressed air system, and low pressure means insufficient brake performance.

Secondly, you need to check that the spring-loaded brake releases automatically. This ensures that the vehicle is not unintentionally held back by the parking brake, allowing it to roll forward freely.

Lastly, confirming that there is at least 3 bar of reserve pressure is essential. This reserve pressure provides a necessary safety cushion to ensure the brakes will work effectively once you begin driving.

In summary, ensuring all these factors are met before setting off aligns with German traffic regulations that prioritize safety and operational integrity of vehicle systems. Ignoring any of these points could lead to unsafe driving conditions. Therefore, a combination of all relevant checks is necessary for a safe departure.