Before which sign must you maintain a distance of at least 10 m, if it would otherwise be concealed by your vehicle?

In this case, the correct options are both the diagonal cross and stop/give way signs. According to German traffic regulations, it is crucial to maintain a distance of at least 10 meters from these signs if your vehicle could obstruct the view of them. This is to ensure that other drivers have clear visibility of the signs, allowing them to react appropriately to traffic situations.

The diagonal cross indicates a construction zone or obstacle ahead, while the stop and give way signs are crucial for managing intersections and ensuring safe vehicle interactions. If a driver cannot see these signs due to another vehicle blocking them, it could lead to dangerous situations on the road. Hence, the rule emphasizes the need for clear visibility to promote safety and efficiency in traffic flow. Choosing both relevant signs in your answer demonstrates an understanding of these safety principles.