We have been driving a Lexus RX 300 EZ for almost three years: 2005 and are very happy overall. Since Friday afternoon the loudspeakers come out of the sound system when switching on crack or banging noises. Strangely enough, these sounds come even if you press any button of the infotainment system. At times these sounds came even when I took the reverse gear and switched on the rear camera. We have nothing to do with the The vehicle is used every year at the Lexus garage for inspection. Maybe someone knows a similar problem or has a tip what it might be. For answers we would be very grateful.