BMW Multi Tool includes forth parts, hardware device, dongle, programmer, software（CAS Plug and CAS4 antenna need pay extra）. Before running software you must connect dongle and hardware device to computer.
1. OBD II: BMW Multi Tool connects to car directly.
2. CAS PLUG: Connect CAN line manually, support 12V. Detail method followed in next page.
3. Support EEPROM dump: get EEPROM dump with programmer.
7 Series CAS1/CAS2 pin method
CAS2(While Box)/CAS3/CAS3+ pin method