ACM version: AHU Vs NG AHU Vs DAB

Hi Guys,

I am about to buy a new ACM for my focus MK3.5. Current ACM is F1BT-18C815-GG and it is not fully compatible with Sync 3.

I know I need to get a model F1BT-18C815-XY

I have 2 questions:

  1. What version of the ACM (X letter) should I buy? (Y letter is the revision, i dont care). I can reprogram the ACM with forscan, maybe version is not important?
  2. I see there are many ACM versions, some flagged as AHU, some flagged as NG AHU, some flagged as DAB. I would like to have a DAB ACM compatible with sync 3. Which version should I buy?

See pics below