A toll must be paid for motor vehicles or vehicle combinations used for commercial freight transport on motorways. From what technically permissible maximum laden mass does this apply?

You answered correctly. In Germany, the truck toll (Lkw-Maut) applies to motor vehicles or vehicle combinations used for commercial freight transport on motorways when the technically permissible maximum laden mass exceeds 3.5 tons. This means that if a truck or a vehicle combination has a permitted total weight above 3.5 tons, a toll must be paid when using the motorway for commercial purposes. This rule is important for distinguishing between lighter vehicles, which are exempt, and heavier commercial vehicles, which must pay the toll. Knowing this threshold helps you determine if a vehicle falls under the toll obligation.