I understand as we had the same experience with our new 2019 LEXUS ES350 that specified to have the Mark Levinson audio system. As I explained in earlier email, we learned the issue from a Toyota employee at the Georgetown KY plant who told us of the issues Toyota/LEXUS had in acquiring the specified ML premium OEM radios such that a backlog of 'finished' production cars sat on the manufacturing plant lot for many weeks until the Georgetown KY plant management directed to take any and all available radios in stock (regardless of model) and install in the ES350's to get the units off the lot. This gentleman told me and my wife exactly what occurred, and he was actually paid overtime that weekend to be part of the team to install the non-ML radios into the ES350's. My opinion: that's why some ES350 cars have the specified ML systems, and some do not. Shame on Lexus who tells us that the audio system on our ES350 'works as designed'. CORRECT! But it's not the audio system that is specified as on the car in the window sticker.