Hi Jim
What type of phone? I had massive issues a while ago when an update in android meant that my existing USB was hopeless.
If you google the "best USB leads for Android auto" you should find some decent options.
It might not be the USB though. My Audi A6 has multiple USBs, only one creates a data / interface connection, the others just charge...... Bloody cars are so complex and packed with tech it's getting ridiculous.
I did find this as well -
https://youtu.be/KmXs7d_tCu8
I had an eclass a while back, one issue is that certain features aren't enabled.....
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