Samsung S9+ not connecting with AA but wife's S9+ works fine.

I'm stumped.

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?

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