The EBD is linked to the ABS function. I would start by getting the airbag module reset. This may even fix the EBD issue. I may have dreamed it, but I'm sure I read a post somewhere about the airbag and ABS module being linked.
As for the power steering, that may be something to do with a loose connection. As you probably know, the Stilo's powere steering is electrical and does not run off a hydraulic unit.
The engine management light is merely indicating that it is reporting an error which could be any of the above.
It would be sensible to get things reset, then follow a process of elimination. After the resets, if you get any more lights, then a diagnostic would be advisable, so you know where to start looking.
I must admit, I haven't had much experience with the Stilo, but with my previous needle in a haystack fault find on a Bravo HGT, I know you can run into alot of red herrings.
Get it all reset then see where you go from there. Naturally a phisical inspection of connectors in the problem areas would be advisable before hand.