"Unprotected" in this context is another word for "unarmored", and unarmored medical vehicles are vehicles used for transporting medical personnel, wounded or sick in non-military or non-conflict environments, i.e. lacking armor protection against attack.
As a Bundeswehr medical vehicle, i.e. in the context of military or humanitarian operations, medical vehicles can appear in different variants, including as armored and unarmored vehicles. For example, an unarmored medical vehicle could include ambulances, patient transporters or other non-specifically protected vehicles that are used for medical purposes but do not provide specific protection against threats that may arise in armed conflict. For example, a Unimog can be used as a Bundeswehr ambulance. It is stable enough and has sufficient engine power to be operational even with armor.
It is important to note that the exact function of unprotected ambulances depends heavily on context and specific use, and therefore their equipment can also vary.
Specialists such as Norrenbrock-Technik, who are active in special vehicle construction, have the know-how and technology to convert a Unimog into a medical vehicle with or without armor, for example.
