How to Repair Benz W211 Hopping Code by CGDI MB Tool

This article is available with the guide to repair Benz W211 original key hopping code by CGDI Prog MB key programmer.

 

What’s the hopping code?

Hopping code (also called rolling code) is used in keyless entry systems to prevent replay attacks, where an eavesdropper records the transmission and replays it at a later time to cause the receiver to ‘unlock’. Such systems are typical in garage door openers and keyless car entry systems.

 

Why does it cause hopping code?

Because most of the keys are too fast to be inserted and removed, and the track code does not roll, resulting in code hopping, so that the key and the lock cannot be matched properly.

 

How to repair the hopping code on Benz W211 by CGDI MB?

 

Tools required:

CGDI MB key programmer

Simulation key

OBD connection line

USB cable

Image source: http://www.cgdishop.com/wholesale/cgdi-prog-mb-benz-car-key-programmer.html

 

Main steps:

Step 1: Get the key password

Step 2: Calculate the key track code

Step 3: Save EIS data

Step 4: Calculate the erase password and erase the lock

Step 5: Copy the track code

Step 6: Modify EIS key basic information

Step 7: Write the EIS data

Step 8: Learning key

 

Procedure:

Step 1: Get the key password

If there are no keys, please calculate the password by doing all keys lost

Enter “Compute Password” main page, collect data, upload data and query result to get the key password calculated

 

Step 2: Calculate the key track code

Select “Read/Write key”-> “Read Key/Chip” to read the current key information

Fill in the key password

Click “Current Hash” to get the track code

Pay attention to the prompt “Please make sure the key is inserted into the device, and check the key password, the wrong password calculated track code is invalid”

Calculate the key track code success!

 

Step 3: Save EIS data

Select “EIS”-> paste the key password-> “save EIS data”

Save EIS data successfully!

 

Step 4: Calculate the erase password and erase the lock

Click “Get” to calculate the erase password

Calculate the erase password successfully

Click “Wipe the EIS”

Insert the CGDI MB simulation key into the EIS within 30 seconds

Erase the EIS success

Click “Read EIS Data” to see the current state

The EIS has been wiped out

 

Step 5: Copy the track code

Click “Load EIS Data” to load the data saved just now with the password

Load the EIS data successfully

Click “Read/Write key” to view the key position (key position is 1),

And then copy the track code

 

Step 6: Modify EIS key basic information

Return to EIS page

Click “Allow Modify”

Modify the track code of the key position to the track code of the key

 

Step 7: Write the EIS data

Click “Write EIS Data”

Follow the prompt to write the VIN first, and then write the EIS data

Insert the IR adapter (simulation key) into the EIS within 30 seconds

Write EIS data success

 

Step 8: Learning key

Click “Read EIS Data” to see the current EIS status

The EIS is not activated

Insert the original car key into the lock to learn for 1-5 seconds

The ELV responds, the EIS activates successfully, and the key learns successfully

Finally, click “Read EIS Data” again

W211 lock original key hopping code is repaired by CGDI MB device successfully

BTW, support the key to read and write, you can directly re-match K-line EIS do not support this repair method.

 

That’s all!