How to Renew Mercedes Benz W204 ELV Using Launch X431 Tools

Renew Mercedes Benz W204 ELV Using Launch X431 Tools

When the electronic steering lock (ELV) of a Mercedes Benz W204 malfunctions, renewing it and resetting it to “virgin” state allows the ELV to be paired with the car’s electronic ignition switch (EIS) again. Using Launch X431 diagnostic tools, this process becomes streamlined and efficient. Here’s a step-by-step guide on how to renew the Mercedes Benz W204 ELV and prepare it for new EIS data programming.

Tools Required:

Step-by-Step Instructions:

Launch the Software and Select Vehicle Model
Start by launching the Launch X431 tablet and selecting Mercedes Benz from the vehicle list. Next, navigate to the Anti-theft function section, then click on Wiring diagram. From the list of available vehicles, select W204.

Renew Mercedes Benz W204 ELV Using Launch X431 Tools

 

Review the Wiring Diagram
Once you’ve selected the W204 model, the system will display the wiring diagram for the ELV module. Carefully review the connections required for the process to ensure correct wiring.

Renew Mercedes Benz W204 ELV Using Launch X431 Tools

Renew Mercedes Benz W204 ELV Using Launch X431 Tools

 

Connect the Hardware
Using the X-Prog3 programmer and MCU3 adapter, connect the ELV motor and the Launch X431 tablet following the wiring diagram provided. Ensure that all connections are secure and correctly aligned.

Renew Mercedes Benz W204 ELV Using Launch X431 Tools

Renew Mercedes Benz W204 ELV Using Launch X431 Tools

 

Access the ELV Module
In the Launch X431 interface, go to Replace and Match. Select Read Module Data to begin the process of accessing the ELV module information. At this point, the X-Prog3 programmer will communicate with the ELV, reading the necessary data.

Renew Mercedes Benz W204 ELV Using Launch X431 Tools

Renew Mercedes Benz W204 ELV Using Launch X431 Tools

Renew Mercedes Benz W204 ELV Using Launch X431 Tools

 

Backup the ELV Data
After reading the ELV information, it’s important to back up the module data. The system will prompt you, and once completed, it will confirm a successful backup. This step ensures that you have a secure copy of the original ELV data.

Renew Mercedes Benz W204 ELV Using Launch X431 Tools

Renew Mercedes Benz W204 ELV Using Launch X431 Tools

 

Clear TP Protection
Before erasing the module, it is necessary to clear the TP (Theft Protection) settings in the ELV module. Follow the system instructions to complete this step, preparing the module for erasure.

Renew Mercedes Benz W204 ELV Using Launch X431 Tools

Renew Mercedes Benz W204 ELV Using Launch X431 Tools

 

Erase the ELV Module
Now, select Complete Erase Module from the menu. This function requires an active network connection to communicate with the necessary databases and security protocols. Once completed, the ELV module will be in a “virgin” state, fully erased and ready to accept new data.

Renew Mercedes Benz W204 ELV Using Launch X431 Tools

Renew Mercedes Benz W204 ELV Using Launch X431 Tools

Renew Mercedes Benz W204 ELV Using Launch X431 Tools

 

Write EIS Data
With the ELV module reset, you can now proceed to write the new EIS data to the ELV. This step will pair the ELV with the vehicle’s electronic ignition switch, ensuring proper functionality and security.

 

By following this process, you can successfully renew the Mercedes Benz W204 ELV using Launch X431 tools. This method allows you to restore functionality to the ELV and ensure a secure match with the EIS system.

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