Most W204 W207 W212 ESL will damage with EIS. In this case, there are two possible reasons and solution:
ESL motor is damaged and need to replace a new motor
NEC chip is locked, theoretically it can be unlock, actually it needs to replace new ESL.
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1. Frequently online update
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Xhorse VVDI MB BGA TooL Benz Key Programmer support Benz key, read password and prepare new key via IR. Only 6 Mins to online calculate BGA Password, this VVDI Benz includes Mercedes Benz EIS/ELV Test Line
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EIS/ELV Test Line for Mercedes, No need to have car for test, Can work together with VVDI MB BGA Tool
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