Kess v2 update:

Added support for working through a diagnostic connector with BOSCH MG1CS003 blocks installed on BMW 5 and 7 series cars.

working with vehicles equipped with two ECUs Master and Slave is now available.

To perform these operations safely, in the TOOL menu, you must manually select the Backup and Restore functions (backup and recovery) of the CAFD file (CAFD or CAF-Datei is a file that contains the computer configuration).
List of BMW models on which ECU data is installed:

5-Series G30 340 KW Bosch MG1CS003 (DME 880) RD, WR;
5-Series G31 340 KW Bosch MG1CS003 (DME 880) RD, WR;
7-Series G11 330 KW Bosch MG1CS003 (DME 880) RD, WR;
7-Series G12 330 KW Bosch MG1CS003 (DME 880) RD, WR;
7-Series G12 430 KW Bosch MG1CS003 (DME 880) RD, WR;
7-Series G12 449 KW Bosch MG1CS003 (DME 880) RD, WR.

It supports reading and writing.