If you want to tow a trailer heavier than 4600 kg without air brakes, what do you need?

To tow a trailer heavier than 4600 kg without air brakes, you need a driver's licence class that is appropriate for that weight category. A Class 1, 2, or 3 driver's licence is required for operating larger vehicles or towing heavier loads, as they provide the necessary qualifications due to their training and testing requirements.

Additionally, a Class 4 or 5 driver's licence with a heavy trailer endorsement allows drivers to handle specific types and weights of trailers as well. The presence of an endorsement indicates that a driver has passed further assessments that are essential for safely managing heavier trailers.

Thus, both the Class 1, 2, or 3 licences and the Class 4 or 5 with the required endorsement are essential for towing a trailer exceeding 4600 kg without air brakes, combining the knowledge and skill sets required for safe operation in this category. This is why the correct response includes both these options.