I also noticed in that datasheet, they mention a lot of the flash space as OTP, so being able to read, but not write is expected. I also purchased a bosch version 9 abs pump from a mercedes, and it contains no eeprom, id hazard a guess the code we want is in the mcu, but even with this, the M5 race ABS would need to be opened, dumped, and hardware identified, I guess we could start hunting down cars that use the same brake pressure sensors, the same model accelerometer, and the pins for the mode and ABS error light are populated. Ill hunt down a good M5 unit if the price is reasonable, but for now, We are stuck.