I wrote a article on Benz ELV repair guide before: 2 Ways To Repair Benz ELV/ESL Steer Lock Problem.You need to remove the NEC chip then use VVDI MB TooL to restore the damaged data.Now here I introduce another device (CGDI MB Prog) to repair Benz ELV trouble by OBD port. Vehicle Models Apply: Benz W204,W207,W212 Step 1:Determine if the ELV motor work correctly. Remove the ELV control module from vehicle with wire connector connecting.And connect the clip on the yellow line of the OBD line to the K-line (K-line is the thinnest) of ELV Connect CGDI MB to vehicle via OBD port,then run the software and click”Read ELV Data” The software will show the ELV information after data reading successfully. Then click “Check ELV”,if the ELV is work,it will prompt “ELV is OK!”.If the ELV is damaged (motor trouble),you need to replace a ELV motor or replace it by ELV emulator. Step 2:Erase ELV Click “Get” to calculate the “Erase password”,then it will show “Eras...