A truck for exchangeable load carriers (interchangeable containers) has a permissable total mass of 6,000 kg. The interchangeable container has an empty mass of 1,500 kg. Which mass are you allowed to stow in this interchangeable container?

In this case, the total permissible mass of the truck including the container is 6,000 kg. The container itself weighs 1,500 kg empty. According to German traffic rules, the mass you can load inside the container is the difference between the total permissible mass and the empty mass of the container. So, 6,000 kg minus 1,500 kg equals 4,500 kg. This means you are allowed to stow up to 4,500 kg of cargo inside the container. Loading more than this would exceed the vehicle's total permissible mass, which is not allowed for safety and legal reasons.