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.
Mercedes Locks OBD Test Line 7 pcs for W209/W211/W906/W169/W208/W202/W210/W639 EZS Cable works with VVDI MB Tool