Last Sprinter Screen replacement around 2 years ago I was not offered such a screen, appears they are pretty common in Oz for other Diesel vehicles to reduce engine noise eg 200 Series Cruiser, Ford Terriority. Or are they?
https://bettersoundproofing.com/how-to-tell-if-you-have-acoustic-windshield/
https://bettersoundproofing.com/how-to-tell-if-you-have-acoustic-windshield/