CGDI MB Program W215 W220 EIS All Keys Lost on Bench

How to: Mercedes-Benz W215/W220 EIS read eeprom bench all key lost key programming with CGDI Prog MB.

 

Chassis: W220/W215

EIS Mark: 4J74Y

Symptom: Lost all keys, cannot start car

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Step 1: Read W215 EIS eeprom

Read eeprom EIS data with ecu programmers, i.e CG Pro 9S12 or Xhorse VVDI Prog

Here we take CG-Pro as an example

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Open CG Pro software, select Vehicle->Anti-theft->Benz->EIS-220/215 (HC08)

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Then check wiring diagram

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Connect EIS with CG-Pro and laptop

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Click on Read button

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Read and then save EIS eeprom

Save EIS data file successfully

 

If you use VVDI Prog, here’s the W215 EIS 4J74Y wiring pinout reference:

BENZ-EIS-W220-SECURED-V1

BENZ-EIS-W220-SECURED-V2

Step 2:  Write Key with CGDI MB

Open CGDI MB software

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Select EIS->Upload EIS data

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Then save EIS data

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Select Generate EE-> upload EIS data just saved

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Generate Key File

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Select Read/Write key->Read key/chip

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Insert new key into CGDI Prog MB key programmer

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Click on Reset

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Click on Open/Write

Smart key choose 41 format, commom key and BE key choose 51 foramt

When writing the original key, please make sure that it is erased by the CGDI MB,  otherwise will failed.

Click on Read key/chip

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Select an unused key position

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Write key success.

Install EIS back to car.
Insert new key into EIS.
Do key learning and key programming is done.

 

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