If you think BMW multi tool can only make key for BMW CAS immobilizer system, you are out of date. BMW multi tool can also make key for BMW EWS. Then how to do? The answer is to spend about 90USD to buy one additional CAS Plug for BMW Multi Tool, it is easy to use, no need to remove any part, but just connect it to the OBDII port of BMW multi tool, then it can make key for EWS, EWS 2, 7 Series CAS1/CAS2 plug and CAS3/CAS3+ plug; besides, by using CAS Plug, you can connect CAN LINE manually, support 12V.
Then how to connect CAS PLUG with EWS, 7 Series CAS1/CAS2 and CAS 3/CAS3+?
Firstly, let us know how CAS PLUG looks like, please look at the following picture and word explanation:
1. Connect to device OBDII
2. Supply 12V voltage
3. EWS OBD line
4. EWS OBD line 2
5. 7 Series CAS1/CAS2 plug
6. CAS3/CAS3+ plug