Erase EIS, then re-write EIS and personalize ESL, finally ESL is synchronized. Note:
if you not erase ESL at first, but only personalize ESL, the ESL won’t be synchronized.
To erase EIS, both Key password and Erase password are required.
1) For the key password, you can get it by adding keys.
Now the EIS is full new
Load EIS data
Tick "IR" to write EIS data and "OBD" to write VIN.
Click “Personalize W204 ESL”
Now, the options "Initialized", "TP Cleared" and "Personalized" are ticked, except “Activated”
Insert the original car key then EIS and ESL is in “Activated” status.
Finally renew ESL with success.
It's hard to buy Mercedes 204/207 EIS and they are expensive. If you have 204/ 207 all key lost, you are advised to use W212 EIS for replacement and the ESL needs to be removed.
1pc x ESL Emulator for Benz 204 207 212