The ESL / ELV emulator is used to help W204, W207 and W212 vehicles start the engine when the original steering lock fails and you can not start the engine. You can take the original steering lock out and replace it with this ESL / ELV emulator directly and program the emulator with the immobilizer data of the vehicle. It's an excellent solution for customers when the above problem happens and unfortunately it does often happen.<br /><br />This ESL / ELV emulator is designed to use with the VVDI MB tool and can be used by other machines that support Mercedes and Benz programming.