What must you do after changing a wheel?

After changing a wheel, it is crucial to follow specific steps to ensure safety and compliance with German traffic regulations. Firstly, tightening the wheel nuts according to the manufacturer's instructions is essential because it ensures that the wheel is secured properly, preventing it from coming loose while driving. This is a standard procedure that helps to avert accidents caused by faulty wheel installations.

Secondly, it is important to tighten the wheel nuts again after driving a short distance. This step is necessary because the wheel may shift slightly after initial driving, and the nuts can become less tight due to the heat generated and the forces applied during driving. Re-checking and tightening the nuts ensures they remain secure.

The option about informing the garage workshop that the wheel has been changed is not required for every situation, particularly for personal wheel changes, which is why it was not included in the correct answer. It might be relevant for professional maintenance or if additional services are needed, but for a standard wheel change, the first two steps are the primary focus for safety.