Quick update..

I went ahead and checked all fuses related to the issue. All are good.

Also, out of pure desperation I decided to try resetting/resyncing the rolling code values in INPA again (Option F2, then Option F1 respectively, followed by the catch procedure) to see if i could get them to somehow match again. Although it still doesn't start, it now cranks again!!

It actually sputtered on, then died after that on one attempt before going back to just cranking. At that point I stopped due to not wanting to kill that battery and/or cause further problems. So now i'm back to my initial problem. I'll be checking fuel pressure and will recharge by battery as well, then go from there.

A healthy battery at rest is between 12.4v - 12.6v I believe right?

__________________
'06 X5 3.0i