Upgrade Multimedia System (SYNC -> SYNC3 )

Hi Guys,

I have Mustang GT350 2016 performance package with 4.2" display and Sync, and I'm planning to upgrade the multimedia system (LCD 8", Sync III Module, GPS, and the front Controls Interface Module (FCIM))
). The dealer in my country refused to upgrade because the SYNC III not available in the Middle East. So, I'm planning to get the parts from USA Dealer and install it. I mentioned the parts needed for the upgrade below. I hope you can help to identify if it's correct and possible to upgrade it?


PN#: 14D212
Audio Accessory Interface Module
Human Machine Interface 3 ICE Noise Reduction Module Human Machine Interface 4; With Navigation System, Sync III; Accessory Protocol Interface Module (Sync Module)

PN#:10D885
Audio Unit Display
Human Machine Interface 3 ICE Noise Reduction Module Human Machine Interface 4; Sync III; Front Display Interface Module (FDIM)

PN#:19980
HVAC Heater Control Box
Human Machine Interface 3 ICE Noise Reduction Module Human Machine Interface 4; Human Machine Interface 3; Front Controls Interface Module (FCIM)

PN#:10E928
GPS/FM Antenna Splitter
Human Machine Interface 3 ICE Noise Reduction Module Human Machine Interface 4; With Satellite Radio Reception, Sync III


I have multiple questions below. I appreciate if you can answer it:

• 
  What are the Human Machine Interface and noise reduction mean?
  What is the different between Human Machine Interface 3, 4, and 5?
  Do I need to upgrade the Audio Control Module (ACM)?