OBDSTAR DC706 Clone Benz MED17.7.3.1 Car Not Start?

 Problem:

Tried to clone 2019 Mercedes Benz S450 FBS4 Bosch ecm MED17.7.3.1 with OBDSTAR DC706 on bench. Read and write eeprom/flash successfully, but the car does not start.

Image attached:

 

Solution:
Need to update ECM software to V30.90 or later version. 

Previous versions will read/write INT EEPROM and INT FLASH only.

MED17.7.3.1 also has an external flash chip type S29CD016J.

V30.90 fix bugs and add EXT flash reading/writing.

Add Read/Write EXT flash functions for:
• BENZ BOSCH MED17.7.3.1 TC1797

To clone this ECU, you also need to read and write EXT flash.