8-DCT is listed as a supported unit in the TCU chapter, but the current user manual (v2.1) has no separate section for it. The steps below are the ones kept from the earlier documentation.
Procedure has the following requirements to start :
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Original unit in the vehicle.
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Read the original TCU by OBD II.
ℹ️ Requirement for donor module:
- Brand New/Virgin Transmission Control Unit (TCU) as donor.
Read and save FBS data procedure:
1 |
Connect to the vehicle - In the vehicle by OBDII for reading
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2 |
Open the Mercedes FBS4 software
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3 |
Select TCU
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4 |
Press "Info" button to establish connection
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5 |
Press "Save" button to read and save the FBS data
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ℹ️Important :
Once the reading is complete and the file is saved, please make sure you also make a back-up of the Configuration data of the unit as follows: TCU > "Utilities" > "Save All Config Data". This data together with the FBS4 data will let you personalize a unit.
Personalization procedure:
1 |
Mount and connect in the vehicle the donor TCU by OBDII and Internal CAN connection
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2 |
Open the Mercedes FBS4 software and select TCU
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3 |
Press "Info" button to establish connection
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4 |
Press "Personalize" and select the file with the saved FBS data from the original TCU.
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5 |
Software would ask you to turn IGN OFF and ON to finalize the procedure
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6 |
Program the configuration data by pressing the "Utilities" then "Program All Config Data" and use the files saved from the original TCU.
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7 |
Set the VIN
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8 |
Use the "Program" button in case you need to align software versions.
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