k9t8m

I recently replaced my cracked radiator in my 04 S55. While i had it town apart in the garage, I decided to remove the TCU and sent it out to be tuned. The radiator install was not fun at all, but I finally got the cooling system back together with a new radiator and secondary coolant pump. I reinstalled the TCU in the car so I could burp the cooling system and now the car will not start.

Key turns, all dash lights work.
can hear a relay under the hood click
starter does not engage
cooling fan on when key is in on position

I have also fully charged the battery to make sure that wasn't my issue.

I have reached out to the company that tuned the TCU, but I am still waiting to hear back.

Does anyone have any suggestions on where to go from here?

Thanks!