December 20, 2012 Updated
BepiColombo: Development progressing smoothlyJAXA is performing a manufacturing test of the bus and the scientific equipment for the Mercury Magnetosphereric Orbiter (MMO) flight model.
Those devices whose manufacturing test has been completed are being installed into the satellite main body one by one. After all devices are assembled, the satellite will undergo further tests for about a year including the electrical system test and mechanical environment test.
http://www.jaxa.jp/projects/sat/bepi/topics_e.html