Marco followed the guide. Step 1: Backup original flash via JTAG. He soldered tiny wires to the STM32’s SWD pins (PA13, PA14). Using a ST-Link v2 and a software called STM32CubeProgrammer , he read out the entire 128KB of firmware.
Updating to 2.70 provides several "exclusive" benefits over the stock 2.25 installation: update ktag clone from 225 to 270 exclusive
: Always utilize the "backup" function in the software before performing any writing to an ECU to ensure you have a recovery point. Marco followed the guide