Sorry, I've been in and out from the forum for a while. My ST is an 8/19 buiild. In Forscan, the ENC was available in the "as built" lines. If I remember correctly, it was in the ACM section but i'm not 100% sure. I was just browsing and found it. For me, It was a simple enable or disable option. When I turned this feature on, it gave me the feeling of a silent wind buffeting like when the back window is down. I also noticed that it affected the audio system as well. To me, it seemed like the dynamics were trimmed top and bottom. I disliked it so much, I turned it off and turned FENG back on later that day.
Currently, the car's navigation, all audio, phone and modem are out for the second time. I have an appointment for Monday to have this repaired again. Seems the connectors for the modules corrode easily. I just had this repaired a month ago but it only lasted two weeks. Maybe, I'll change the connector pins to something gold plated or anything better than the crap they are using now.
When I get the car back, hopefully Monday, I'm going turn FENG back off. I'll take post photos of the screens and document the paths to get to the ENC.