Xhorse Multi Prog read VW EDC17C46 ECU in Boot

 EXPERIENCE with EDC17C46, Xhorse Multi Prog, tuning files & BOOT recovery.

Tested a few tuning files (Stage 1 + EGR/DPF OFF) on a VW Tiguan Bosch EDC17C46 ECU.
To avoid any risk to the original unit, he intentionally cloned the original ECU just for testing, using VVDI2 for IMMO and MultiProg for EEPROM and FLASH read/write.
Here’s how it went:
Cloning worked perfectly – ECU booted with no issues.
Reading/writing via BENCH mode with MultiProg worked fine at first.
But when I tried flashing a tuned file, writing stopped at 34–37%.
Tried a professional file from Autotuner – exact same issue (stuck at same %).
Finally, he restored the ECU via BOOT mode (Tricore BSL) – flashed the original, and ECU came back to life.

Conclusion:
VVDI2 + MultiProg is a great combo for cloning (IMMO + PFlash)
Files from tuning platforms like Autotuner may not be compatible with MultiProg when flashing via BENCH.
If flashing stops at the same %, it’s very likely a file structure issue, not your tool.
BOOT mode with MultiProg saved the day – full recovery worked.