U.S. Army Master Sgt. Ryan Thiers and U.S. Army Spc. Stiven Rosales, both wheeled vehicle mechanics assigned to 21st Theater Sustainment Command, use a maintenance support device at the Daenner Kaserne Motor pool Dec. 18 in Kaiserslautern, Germany. Mechanics use this device as a starting point for troubleshooting, replacing and ordering parts, and utilizing the guides of different electrical systems.