My s9+ has been working with my 2016 Vw golf with built in AA, but stopped connecting a few weeks back .
Tried factory reset of phone.
Tried factory reset of vw headunit through menu options.
Tried 3 different usb-c cables, but here's the kicker- my wife's s9+ is identical make/model with 8.0 and it works great. Connects right away with an cable.
When I plug my phone in it just shows "charging". I went to developer options and enabled USB debugging but it still won't recognize a device is connected.
Any other ideas?