Together, did one of you order the sound and thermal insulation glass (VW5) in the nine CAY or installed it? – does anyone know the noise reduction in db ??? – are also the rear panes all in insulating glass, since privacy tint is installed here? is the tint of privacy glass in insulating glass more or less? (Porsche writes: similar ???) – is it really much quieter at higher speeds? – is the extra weight worth it? Thanks for your help AUDI-DUS, from July with CAY (I have by the way nothing found in the forum!)