You are returning on a tractor from working in a field and want to turn onto a road. What should you observe in order to avoid dangerous situations?

The selected combination is correct because each option contributes to safe driving practices, especially when returning from working in a field.

1. Keeping the windscreen clean is essential for visibility. A clean windscreen ensures that you can see the road and other vehicles clearly, preventing accidents.

2. Avoiding places where drivers with the right of way cannot be seen from an adequate distance is crucial. This helps prevent situations where you might pull out onto the road without seeing oncoming traffic, addressing the risk of collisions.

3. Being directed onto the road when your vision is restricted is a key safety measure. This often means waiting for clear guidance or assistance if your view is blocked by obstacles, ensuring that you do not enter a roadway unsafely.

Together, these measures adhere to German traffic laws that emphasize the importance of visibility and clear judgment while maneuvering vehicles, especially in situations that may present visibility challenges. This combination aims to enhance safety for yourself and other road users.