Unable to connect to Apple Carplay by USB

[vwcaliforniacornwall]

Hi
I have just bought a 2019 T6 California Ocean with the Navigation system "Discover Media Plus". I am trying to use Apple CarPlay via App connect and USB.
I have an iPhone 13 ProMax running iOS 15.6.1 and have tried connecting via both USB ports using a genuine Apple cable as well as several others.
There are no issues connecting the phone by bluetooth and when connected by USB I can access all of my music and playlists.
When I plug in or click App Connect I get a message that the iPhone will no longer be available for selection as a media source then iPhone disconnected - "please ensure that your iPhone is unlocked".
I have obviously unlocked the phone both before connecting and afterwards, ensured that access to USB is allowed, ensured that Siri is active, reset my phone and reset the VW system to factory settings but I am still unable to get the CarPlay Working.
Anyone had similar issues or a solution?

Cheers

 

[Keith Smith]

I had similar problems when connecting my iPhone to use Maps for navigation. I was told the Apple lead wasn’t compatible so I got one from the VW dealer and it worked. No idea what the difference is. No real problems since as long as I turn the car system on first, then plug the phone in using the USB a socket in the glove compartment.