Mercedes Benz W204 ESL Unlock and Renew Guide

Mercedes Benz W204 ESL get broken easily,and if you go to stealer to replace a new one,it will cost more than $500.So is there a better method solve this problem?Here I share the method of how to unlock and renew W204 ESL.You can provide a better price for your customers.

What you need for unlocking and renewing the W204 ESL:

VVDI MB BGA Tool

VVDI MB NEC ELV adaptor

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Procedure of Mercedes Benz W204 ESL unlock & renew:

Step 1: Open ESL emulator and take out the PCB. Desolder the IC chip form PCB and solder it to VVDI MB ELV adaptor.

Fix ELV adaptor to VVDI MB Tool.

Step 2: Open VVDI MB software, choose “ESL Function: Adaptor” and “Chassis: W204, W207, W212” and click “Read ESL data”.

It will show ESL is locked, click OK to continue.

 

Step 3: Click “Unlock W204 ESL”. Now VVDI MB Tool with NEC ELV adaptor is trying to unlock ESL. (This process may cost about 2~3 hours)

 

Step 4: After that click “Read ESL data” then click “Check ESL damage”.

It will show ESL is unlocked (normal status), click OK and “Save ESL data”. Save this new bin file and rename it to distinguish it from the old one.

 

Step 5:Now solder the IC chip back to ESL and connect ESL to VVDI. Click “ESL Tests”, set “ESL Function: OBD” and click “Read ESL data”, you can see ESL is renewed to normal status successfully!