Detailed description
If you already have a Class B (car) driver's license, you can upgrade it to include additional driving privileges. You can also upgrade to include a Class E trailer license, allowing you to tow larger and heavier trailers with your car (Class BE).
With a class BE driving license, you can tow a trailer with a total weight of up to 3,500 kg. With a class B car driving license, however, you are only allowed to tow trailers with a maximum total weight of 750 kg.
To apply for a trailer driving license, you can usually submit your documents to your driving school and they will take care of everything else for you.