CGDI MB Program Mercedes EIS A246 All Keys Lost

New test report:  Programming CLA 2014 with EIS A246 ALL KEY LOST with CGDI MB success in 6 minutes including password calculation.

Model: Mercedes CLA 2014 S A264

Devices to program: CGDI Prog MB Benz and AC adapter for quick data acquisition

Step-by-step procedure:

Step 1: Calculate password

Connect AC adapter with CGDI MB and EIS


Read EIS data


Then go to Compute Password- Copy key without key- Collect data-OBD mode


Insert the simulation key into EIS in 30s

CGDI MB AC Adapter collects data very fast


Save key file


Upload the data to calculate password


Upload data successfully, press Query Results


Calculate password success. Copy the pass

Step 2: Generate Key File

Go to EIS, read EIS data


Paste password here


Save new EIS data


Go to Generate Key File


Load EIS data just saved


Choose key file format V51 and Generate key file


Key successfully calculated. Save them

Step 3: Write Key

Now go to write new key with CGDI MB

Select Read/Write Key function- Read Key/Chip


Insert new key into CGDI Prog

It is a blank key. Press Open/Write


Choose common BE key format V51


Choose a key position

Write key success

New key is not activated until we insert it in EIS


How to Update CGDI Prog MB Key Programmer Software and Firmware?

Both CGDI Prog MB software and firmware can be updated online for free.  The newest version is always available to download free on official website。

How to Update CGDI MB software & firmware?

When a new version software is released, the software will prompt “discover update available” and update feature.

Current version (2019/05/10)


Press Update Now and wait till the process completed.


If the device firmware is too old, CGDI software will require to run firmware update


Click setting icon->Firmware Upgrade


Update firmware in process


Firmware update completed.

Disconnect the USB and reconnect again.


How to collect data for “old version” Benz W164 with CGDI MB via OBD

CnAutotool shares how to use CGDI Prog MB with AC Adapter to collect data for “old version” Benz W164 by OBD. Here is the detail for CGDI programmer users.

Step 1: Connect CGDI prog MB to computer

Step 2: Collect Data

Step 3: Save EIS Data

Step 4: Calculate Key Password

Step 1: Connect CGDI prog MB to computer

According to the Wiring diagram display to connect all the devices

How to collect data for old version Benz W164-1

How to collect data for old version Benz W164-2 How to collect data for old version Benz W164-3

How to collect data for old version Benz W164-4 How to collect data for old version Benz W164-5

Step 2: Collect Data

Open CGMB software

Go to EIS> Read EIS Data to current key status

How to collect data for old version Benz W164-6

Click on Computer Password> Copy key without key > Collect Data

Select Platform mode (Quick collect) and press OK

How to collect data for old version Benz W164-7

Collecting data…

Follow the prompts: Please insert the simulation key within 1 minute, if you have inserted, please pull out and try again.

(Please turn the quick collect adapter switch to the Platform position. Turn the key to the ignition switch ON position.)

How to collect data for old version Benz W164-8

Collecting, please wait…

(It needs about 5 minutes)

Saving the data…

How to collect data for old version Benz W164-9

Save the file successfully

Step 3: Save EIS Data

Select Computer Password> Copy key without key> Upload data

Select the file just saved

Upload data successfully

How to collect data for old version Benz W164-10

Step 4: Calculate Key Password

Click on Query result

Calculating the key password…

Computing success!

How to collect data for old version Benz W164-11

How to use AC adapter with CGDI MB for W639 all keys lost

Test report: CGMB Prog Benz Monster + AC adapter for Mercedes Benz W639 all keys lost.

Hardware: CGDI Prog MB programmer + AC adapter


Software: CGDI MB


EIS: W639


Wiring diagram:

cgdi-mb-ac-adapter-how-to-use-2 cgdi-mb-ac-adapter-how-to-use-4

cgdi-mb-ac-adapter-how-to-use-5 cgdi-mb-ac-adapter-how-to-use-6


Step 1: read EIS data

CGDI read out EIS data


Step 2: calculate pass

CGDI MB calculated password



cgdi-mb-ac-adapter-how-to-use-9 cgdi-mb-ac-adapter-how-to-use-10

waiting to read EIS data


pls unplug the direction lock ELV and connect the clip on the yellow line of the OBD line on the directional lock plug (the most fine line in the directional lock connector in the K-Line)




pls insert the simulation key within 1 minute. if you have inserted it, pls pull out and try again
cgdi-mb-ac-adapter-how-to-use-14 cgdi-mb-ac-adapter-how-to-use-15

you need a key emulator




CGDI MB read EIS data successfully

save data


upload data
cgdi-mb-ac-adapter-how-to-use-19 cgdi-mb-ac-adapter-how-to-use-20

query result

cgdi-mb-ac-adapter-how-to-use-22 cgdi-mb-ac-adapter-how-to-use-24

CGDI MB Key Programmer managed to read out W639 password!


CGDI MB Replace Benz W204 W207 W212 ELV and Replace ELV Emulator

CGDI Prog MB user manual: How to replace used/new ELV and replace ELV simulator.

Part 1: Replace ELV CGDI MB

Part 2: Replace ELV Simulator with CGDI MB

Part 1: Replace ELV CGDI MB

Connect the power, USB cable OBD connection device

The vehicle is replaced with a used or new ELV

I. Replace used ELV


OBD connects to vehicle, open software, click ‘Read ELV Data


please connect the clip on the yellow line of the OBD line to the K-line on the ELV plug.


Read the data successfully, show the related information


ELV is normal and can do repairing


Get ELV erase password


Erase the ELV success


Read ELV data again, to display related information after erasing

II. Replace new ELV


After reading the whole new ELV data,the related information is showed as above,you can do following
operations without wiping ELV data.

Collect and calculate anti-theft passwords


Read EIS Data


Enter“computer password”,choose ”copy key with key”(If you lost all keys,you can choose ” copy key
without key”)


Default “other keys”, click ”OK


The collection process will not be described one by one, follow the software prompts, eventually you can get
the anti-theft password .


Copy and paste the password to ELV


Save ELV data(Please default file name)


Get erase password successfully


Click ”wipe the EIS ”,It will shows ”please insert the simulation key into the EIS in 30 seconds”


Picture for physical operation


Erase the EIS success


Read EIS data again to show related information


Load the origin data(the ELV data saved initially)


Click ” write EIS data”


please insert the simulation key into the EIS in 30 seconds


physical operation connection


Write EIS data success


Read EIS data again to show related information


Click“sync w204 ELV”,when it shows sync w204 ELV success, please insert key into EIS for activation

Activated successfully , can be used normally

Part 2: Replace ELV Simulator with CGDI Prog

Read EIS data


Turn to“compute password”, collect data

The collection process will not be described one by one, upload data, successfully query the password and
copy the key password


Turn to the EIS interface and paste the key password


Save data,Default file name


Put on the CGDI ELV renew simulator and clip the K-line


Click“ELV”, enter“ simulator”


Read Simulator, display related information


erase simulator success

Load the EIS data just saved and check whether the key password is correct

Click ‘write’ button

Write ELV success, please insert key into EIS and switch ignition on for activation

Actual operation

Read simulator again, show activated, match successfully!

Mercedes Benz key programmer, buy AK500 Pro or Ak500+

Here are two kinds of MB key programmer listed to show their similarities and differences, which may help you to buy the one you need.

5-1 5-2

Conclusion & Purchase recommendation:
From the table above, it is easy to find that AK500 Pro Mercedes Benz Key Programmer better than AK500+, which supports keyless go function and all Intelligent Benz keys 2000-2010. And because it is the original product, MB AK500 Pro is of high quality, works stable, and can be updated (via Email).

But according to customer feedback, here CnAutotool highly advise you to buy AK500+, for the following reasons:
1. AK500 + for $399, much cheaper than AK500PRO ($2340)

2. In most cases, it can meet the demands like:
1) Match and support function “Keyless Go” of Benz Infrared Key;
2) Support Benz Infrared keys lock and unlock for EIS+ESL+ESM , the leading technology all over the world;
3) Support Directly reading EEPROM for BENZ DAS( 1995-1998 )via OBD, can to unlock DAS when you lost all keys and DAS is locked;
4) Read and write the ESL of E/Class and C/Class via K_line, no need remove ESL;
5) Support Benz ECU’s flash(29F400 and 29F800) generate key data. Need use STAR 2000 to do ECU coding.
6) No need to choose the MCU type of EIS. When load EIS file, recognise EIS file, and generate key file. If your MCU is HC705, software will automatically suggest “load next EIS file of HC705”
7) Powerful Motorola MCU programming function,Directly reading dumps of EEPROM(HC908) and Flash(HC912,HC9S12,HC9S12X)for motorola MCU, in support of the engine ECU of Benz, BMW, VW and Audi etc MPC(MPC555/556,MPC561/562,MPC563/564),external Flash(MB58BW016,29BL802C,AM29BDD160,S29CD016,DE28F800 etc.) and external EEPROM(M95xxx). An advanced tool of car ECU repair and programming, odometer adjustment and key programming as well.

3. AK500+ is much easier to program keys.
make new MB key with AK500+ – with SKC:
-Remove EIS
-Desolder CPU 1 from EIS
-Read data from EIS – CPU 1
-Close AK500+
-Open SKC Calculator
-Download the bin file
-Select keys for calculating result
-Calculate keys (About 7-10 minutes)
-Close SKC Calculator
-Open AK500+ again
-Click Step 4 to write the key option via IR
-Insert the key
-Load key dump file
-Click on programming

make old MB key with AK500+ Pro with SKC:
– Remove the NEC chip from the old key
– Put the removed NEC chip on the NEC adapter of the AK500+
– Ensure the chip direction is correct, and clean up the tin on the chip angle
– Open the software and choose “Renew”
– Write into the NEC chip with the key data generated by SKC Calculator, the key is that your car will use.