The CurtainSider is a refinement of the closed body. As with traditional platform gate and sideboard vehicles, fork lift truck loading from the side, which is a far more efficient form of loading, has now become possible. Bulky goods can now be loaded very quickly through the sideboard, which can be opened along almost its entire length. As the roof is independent, the cargo space remains protected against rain. From 1990 onwards the development of self-supporting sliding roofs meant that crane loading was also possible for this type of body.