⚠️ The GT-DCT procedure is the same as for the 8-DCT. Both are listed as supported units in the TCU chapter, but the current user manual (v2.1) has no separate section for either.
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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