Locate the vehicle from the list on the left side of the Map screen or select it directly on the map.
Click on the blue Add trailer button or the pencil icon on the right from the current Trailer in the Vehicle Data Panel.
In the pop-up window, press Change and choose the Trailer from the dropdown list or Remove to leave it without a Trailer.
Click SAVE to confirm trailer changes.
🔔 Keep in mind! Trailer changes should be performed while the vehicle is stopped. Otherwise, trailer changes will apply only after the next stop.