MD-0031UL Dilanza Sol (ディランザ・ソル Diranza Soru?) is a mobile suit introduced in Mobile Suit Gundam the Witch from Mercury.

The Dilanzas used at the Asticassia School of Technology follow the school's regulations. As such, these units have limiters that decrease 30% of their energy output. The Dilanza Sol, on the other hand, has no such restrictions and functions as a true combat-ready mobile suit. Its armaments and equipment are also modified to have a higher performance that the standard Dilanza simply cannot match. With a simple removal of its limiters, the Dilanza Sol fulfils its true power without any large-scale overhauls. In other words, all Dilanza units have the potential to be a fully combat-ready mobile suit. Its shoulder-mounted shields are thicker than the Dilanza's providing greater protection. The head unit also contains a military-grade radar system.