TonyLC350

Apologies if this has been covered previously. I have a 2011 C350 and have installed the subject adaptor for CarPlay. I am able to connect via Bluetooth and WiFi but unable to reproduce any sound or vision to the original MB NTG4.5 screen. Have also tried USB and AUX cords without success. Was just wondering if any members here have encountered the same issues and how they corrected same. I have checked and rechecked all wiring and all appears to be in order. My AMI is working but not sure of the USB and female AUX connectors as they have a production date of 2008. If anyone has any insights or suggestions they an offer it would be great appreciated. Take care all