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An ordinary truck towing a heavy trailer (trailer GLW over 3,500 kg) has a gross combination weight of 25,500 kg. What is the lowest required full licence class, excluding special tractor exceptions?
普通卡车牵引重型挂车（挂车GLW超过3500公斤），组合GCW为25500公斤，不涉及特殊拖拉机例外时，最低需要哪类全驾照？
Class 5 is the lowest required full licence class.
Class 5。
阅读相关知识
An ordinary combination exceeding 25,000 kg GCW falls within Class 5. The question excludes light-trailer and special tractor exceptions; vehicle structure matters as well as weight.
普通组合车辆GCW超过25000公斤属于Class 5范围。本题已排除轻型挂车及特殊拖拉机的类别例外，不能只看总数字就忽略车辆结构。