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.

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What you need for unlocking and renewing the W204 ESL:

VVDI MB BGA Tool

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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.

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Fix ELV adaptor to VVDI MB Tool.

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

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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)

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

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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.

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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!

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