cf30 lapwith diagnostic tool mb star c4 sd connect ssd 2022.12v hhtwin win10 diagnosis system compact 4 for mercede car truck scanner

never insert batterries into the c4 multiplexer, even the screen shows" check batteries" the new generation for diagnostic equipment for all current and new coming vehicles as for china copy c4, you can use any la with sata hard disk instead of that heavy touch-screen computer. the new is better than c3 and it can connect mb internet to update and to programe and to set codes. it is including diagnosing, programming, simulation studying, repair information, automotive maintenance, technical service bulletin and so on..syi