The maximum authorised mass is the weight of the load that can be pulled by an empty towing vehicle with driver, 90 % remaining fuel and a trailer.
driver: 87 kilogrammes
+ car: 1800 kilogrammes incl. 80 kilogrammes fuel
+ trailer: 200 kilogrammes
= total empty weight: 2087 kilogrammes
If the permissible total weight is 2445 kilogrammes:
= 358 kilogrammes
The maximum authorised mass may not be exceeded, therefore maximum 358 kilogrammes can be transported.
What is the difference between the real total mass and the authorised mass?
The real total mass is the weight of the towing vehicle plus trailer.
The maximum authorised mass is the weight prescribed by law or the producers.