MB STAR COMPACT4 is the lately updated professional diagnostic equipment for Mercedes Benz cars manufactured after year 2000. It is much difference in the shape from Compact3 and smaller in size, lighter in weight than Compact3. C4 2008 can do all the works what Compact3 does and it is the replacement of Compact3-Star. C4 operates based on the Windows XP system, it includes workshops information system (WIS system), the movement management system and the automatically diagnose system (the DAS system) . C4 2008 STAR works with original computer (COMPACT 3) via both of RS232 and 485 protocols. Power can be supplied to original computer(COMPACT 3) via the cables.Compact3 star can diagnose varied cars,trucks,buses of Mercedes Benz making.