Received my special order 2017 Ford Fusion Titanium Hybrid in late December, 2016. Starting on early March, 2017, I started getting periodic messages from the FordPass App that "DEEP SLEEP MODE ACTIVATED". This made no sense as I drive the car daily. Shortly thereafter, the Sync 3 Home Screen began displaying a "System Off to Save Battery" message when entering the vehicle. Upon starting the vehicle, Sync 3 started but the Audio was not operational.
I finally took the car to the dealer for warranty service and gave them the information I found on the Ford Fusion Hybrid Forum on two topics involving 2017 Ford Fusions Hybrids with similar symptoms to mine: "Deep Sleep Mode Activated" and “12v Battery Issue on 2017 Fusion Hybrid”. Unlike the Fusions discussed in the topics, my battery never fully discharged.
The dealer did not replace the battery but performed the fixes described in SSM46440 - Some 2017 Fusion, MKZ, Continental and MKX with an instrument panel center mounted speaker may exhibit no audio, navigation inoperative, inability to access audio features with all controls including steering wheel switches and voice commands with Diagnostic Trouble Code (DTC) U0184. If unable to communicate with the audio control module (ACM), remove the radio power fuse for 10 minutes to reset the ACM. Reprogram the ACM to the latest calibration using the Integrated Diagnostic System (IDS) release 104.03 or higher.
I have had the car back for a week and all is well so far.