Mercedes Software Update Questions

[1spat]

Please can someone explain two things to me?

When flashing an engine ECU, there are several software files. How do I know which ones to flash?
How do I find out the latest hardware/software version (without using online Xentry)?

I have attached a picture showing 3 current versions of the software and 2 newer versions. I entered the HW number in SW Finder 5.2 but it only showed one matching file, so I guess the database is out of date. Is there another way?

 

[tera1125121]

Newer version available. Not found in 5.2, better get latest version from XUS.

 

[1spat]

I can get the latest version using XUS as you say, but how do I know which file is the latest so I can find it?

 

[Mersovod]

1 software number, boot (bootloader, usually not needed for updating).
2 software number, code (coding option).
3 software number, date (control program itself).
For updating, code and date are usually required.
But the most important question is: what is it for? Unless TIPS specifies updating recommendations.
Not everyone has access to XUS.

 

[1spat]

Thank you very much for this explanation.
For example, if I have a car that I need to remove AdBlue from and there is no newer file online, I would try to flash it to factory firmware using DTS, but I don't know what files I need to reflash.
I've seen people flash only one firmware file, but Xentry often flashes two and I don't know why.
I'm trying to understand these things in more detail.

 

[myztic]

If you just need to reflash, then do not touch *904*, find your software numbers in SW Finder and reflash them. For engine modules it is *902* and *903*. The *904* file is a bootloader, and if something goes wrong, your control unit will stop communicating.

 

[Mersovod]

If you think you will find the original firmware with AdBlue removed, you are wrong. This is done with other tools.