[zapdus]

Hi
To read and write that ECU on OBD, you may need tool capable of virtual read, some version can not read on OBD
Or use BDM
This is for ECU siemens sid201

I did few SID201, I download virtual read and write
Last ecu I made didnt have virtual read, I got original from internet and killed ECU, had to take off and read in BDM, restore to original based on other file and car started

Then use OBD to write

It’s SID201 from what I see here.

Not sure what BDM is so will have a search later this evening when I’m back on computer.

Do you mean even just the READ can kill the ECU? What virtual read and write did you download ?

Edit: I already ordered KESS V2, but should I have ordered the KTAG instead?

No
It is not possible to read SID201 with KESS on obd, you can only ID and write
If you have correct virtual read file you can write and will work perfect
In my case I writed the wrong virtual read file and ecu locked, had to read on BDM, rebuild file and write again
Be careful because if you write wrong file car will not start and you will not have true read from ecu