What applies to the operation of vehicles with regard to the height of the vehicle, including the height of the load?

Your answer is correct because German traffic rules require drivers to be aware of the total height of their vehicle, including any load on top. The official vehicle height is listed in Part I of the registration certificate, so checking this is essential. Additionally, if the load extends above the vehicle, its actual height must be measured because this affects clearance under bridges or in tunnels. However, there is no fixed legally permissible maximum height of 4.5 meters for all vehicles; instead, height limits depend on specific road regulations, so you must always measure and respect local restrictions. This careful attention helps prevent accidents or damage due to insufficient clearance.