My car was built in December 2016, registered in 2018, so "technically" it's a 2016.
My software was always 056.xxx.xxx
How this all started for me was they did a software update and it screwed up the voice commands, as they knew me well and my contacts, they generously offered to replace the whole unit at a cost of around $7,000 (to them and not me as it was their fault) as they could not roll back the software.
I used this opportunity to try to get the ACP into my baby, then went down the rabbit hole.
I spoke on PM with
@MacGeek and he was very helpful, his info below if interested, but the long and the short of it all was that it was too risky for me to do. If someone else has pulled it off, I am ALL EARS! Hence why I am here, would LOVE to have this feature so any info I can pass on that may be off assistance I will:
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Yes, the ETM module is the brain of the screen. The screen in the dash is just that, a screen, and it connects to the head unit (ETM) that is under the dash in the footwell area via a LVDS cable.
As for the feasibility of the change, you need the new ETM, the new USB/Aux module (inside the armrest storage compartment), and most importantly the feature needs to be enabled in software.
As for the ETM, codes are the following:
P/N 50553593 is the one currently in production.
P/N 50560294 will be adopted in production from late September. I don't know what the difference from the current one is.
The new USB/Aux module has P/N 156138299.
Now for the hardest part, the software unlock. All current production Giulias have ACP/AA capable ETMs, but in most markets ACP/AA is offered as a paid option. Therefore, the feature is only exposed when the Body Computer "Vehicle Configuration" file (aka PROXI) contains the appropriate option code.
For reference, the official procedure to enable ACP/AA on early MY18 "pre-wired" NAFTA cars requires the dealer to connect the wiTECH tool, connect to FCA servers, add the option codes to the Body Computer, and then, also using wiTECH, activate the feature in the ETM.
I have no certainty about whether this file can be suitably modified on an older car. If at all possible, it would likely require a 3rd party diagnostic tool, like Accinni's Leonardo or Multiecuscan."
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"The part numbers I gave you are for Australia.
In any case, the electronic architecture itself does not differ between NAFTA and EMEA/APAC/LATAM (cabling obviously does differ between LHD and RHD).
Based on my knowledge, I do not see the newer head unit creating other electrical issues in the car.
What remains unknown is whether they'll be able to activate the feature. The wiTECH tool downloads from FCA's server a VIN-specific Vehicle Configuration file, containing all the equipment and configuration codes present on the specific car. This makes me suspect that, until a 3rd party such as Accinni or Multiecuscan manages to figure out exactly what needs to be tweaked and how, direct FCA involvement would be needed to add the relevant codes to your file and make enabling ACP/AA feasible.
In a nutshell, I don't see the new head unit creating other issues, but I don't know whether the swap will actually allow you to get ACP/AA, due to that software caveat."