Car wont start but if I unplug ESP module it does ?

[Nod]

As title, was sometimes getting ABS and ESP errors and you go to start car and nothing. won't fire or turn over....
Unplug the ESP module and it fires immediately on the key and runs but obviously with ESP and ABS errors as the module is not connected.

I swapped out the ESP module with another but its still the same and it does not attempt to start.

I have a friend with a good Snap on Scanner tool but may take a while for him to find the time to drop by.
Any ideas I could try in the meantime?

 

[mersum1es]

W211? SBC? Remember one case where SBC fault prevented starting, but can't remember why...

 

[Nod]

W211? SBC? Remember one case where SBC fault prevented starting, but can't remember why...

Thats what I thought it could be. I did try unplugging the SBC(and leaving ESP module plugged in) and it still didn't start.
As said, it only starts when I unplug the ESP module.