Glossary
Trailer weight is the actual weight of the trailer including the load, i.e. the weight that would be displayed if the trailer with load were placed on a large scale.
A light trailer has a total weight of no more than 750 kg, as long as the trailer and the car have a combined weight of less than 3,500 kg, heavier trailers may also be driven with a B licence.
With an extended B licence, you can drive vehicle combinations with a car and trailer that extend up to 4,250 in combined weight.