Hi all
A bit of help please!!

I have an A class with 1.5 diesel engine (2014) which does not start when turning the ignition key. Some lights on dashboard but nothing happens when turning the key.
I have tested a few things such us:
Alternator has power
Starter motor has power and is earthed
Pyro fuse in battery is good as both wires have continuity.
ABS module has cleared crash data.

Could it be the ECU knows there was a crash and needs to be activated again, or is there another security that is cutting power I need to check in?
What software should it be used to read ECU?

Many thanks in advance!