Android Auto seems to be a problem with many cars and many devices. The correct cable fixes a lot of issues so I would recommend trying the cable that came with the phone. Also try different USB sockets if more than one in the car. I found you some reading
https://www.wheelsjoint.com/volkswagen-caddy-android-auto-not-working/To connect to your PC, install Samsung USB drivers and make sure the phone is unlocked when connecting.
