I have a cl550 that has been performing lovely till the other day when my sound just wouldn't come on radio. The module cuts on navi still works just doesn't play sound , radio says no device connected as well as MP3, Bluetooth , and auxiliary when you goto it. I tried u plugging the negative cable under my hood for 5-10 minutes still nothing. Any help?

 

Hello and welcome to the forum! I've attached a link to help you troubleshoot the sound issue that you're having. I hope you find this helpful, best of luck!

Troubleshoot Audio Comand NAV Radio No Sound Problems