What are the possible consequences if the wheel nuts are not re-tightened following a tyre change?

Your selected combination of answers is correct. In German traffic regulations, it is crucial to ensure that wheel nuts are properly re-tightened after a tyre change. If they are not secured, the following can occur:

1. The wheel may become damaged: Loose wheel nuts can lead to misalignment or stress on the wheel hub, potentially causing damage.

2. The wheel can become detached from the vehicle: This is a serious safety issue. If the wheel is not secured properly, it can detach while driving, leading to loss of control and increasing the risk of accidents.

Both of these consequences highlight the importance of adhering to proper maintenance and safety regulations outlined in the German traffic laws. It is vital to forego risks by confirming that all components are correctly installed and tightened.