I have just bought a brand new IS300H FSPORT with Mark Levinson, and have noticed that the audio volume level decreases unless you select a different audio output then revert it back to what you originally had it on. So for instance... I was listening to a CD having selected disc and the volume is on 21, it plays fine / you can hear the audio but if you select another source, say DAB then revert back to your CD, and not adjust volume so its still on 21, the audio is way louder. It does not matter what source you select initially and change to, whether periodic or quickly. Audio is louder when you select the source you were using first.
I am going to Lexus tomorrow to have some transponder options programmed and am going to get tech to look at this as its bugging me. Only had it a week, but its my 12th Lexus car.
Has anyone else noticed this problem / had this issue??