Have a Mark Levison AM/FM Cass/CD radio with Nav System. When we start up car radio can take 30 secs to 15 min to start playing. Tuner shows that is receiving signal ie: FM signal shows songs playing, can use tuning control to change freq., can change over to CD and shows playing track and time. Just no volume control. When you turn volume control shows no volume number change on screen until unit starts playing, then volume numbers appear. Is this a amp issue or radio issue?

 

The only think I don't like about Lexus a little bit it's the Enform system.

Great car but the entertainment system has to be developed further.