Most W204 W207 W212 ESL will damage with EIS. In this case, there are two possible reasons and solution:
1) ESL motor is damaged and need to replace a new motor;
2) NEC chip is locked, theoretically it can be unlock, but it needs to replace new ESL.
CGDI Prog MB Key Programmer, fastest key programming tool to calculate password : collection time 1'50s, password calculation time 40s
Support all key lost for 211,209,204,207,212,166,246,197,172,164 +, 216
CGDI Prog calculates passwords twice for free each day.