Problem:
I have an original Mercedes V51 nec key with me that is dead – unrecognized by eis, now I have made a BE/BGA key already and got the vehicle started already but would like to play around a little more and why/how/where the key malfunctioned, prolly corrupt mcu data since I can identify the key by xhorse vvdi mb via ir and nec key adaptor but when I try to read key password, it gets stuck at 50% then returns error -1004, and when renew I get error -0001, why does this happen? is it because I am using the older nec adaptor?
Solution:
Either use the new solder free adapter or bridge the pads conn 2&3/whatever combination depending on chip type, it worked for me.
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