A Class 5 or 7 passenger car driver’s licence allows towing trailers up to 4,600 kg. To tow a trailer that weighs more than 4,600 kg, you need: (a) A Class 1,2, or 3 driver’s licence, or. (b) A Class 4 or 5 driver’s licence with a heavy trailer endorsement (code 20), or. (c) …