Go123

Transmission is improved without any lag/hesitation in throttle.

SYMAWD

DeerHunter

By any chance does that make the glass theft-resistant (I assume that's plastic film in the glass sandwich)?

msaudiq5

I see that double glass in front but not rear windows. What was the point to do 50% of windows isolated?

Go123

Windshield is also Acoustic Glass.

m444

My 2011 S4 Windshield was also Acoustic Glass.

I can feel some lag/hesitation in throttle, before it decides to react on my 2016 S6

MikeS6

It was a minor upgrade to help reduce noise entering the cabin, and yes I'd assume it would be more difficult to break or shatter the glass, making it more theft resistant. Doing only the front windows still reduces noise, gives Audi the ability to mention there "been an upgrade" and by only doing the front windows, helps to keep the upgrade costs in check.

diverdan

Off the top of my head, I'd say that using acoustic glass on the front windows would be beneficial at stopping wind noise, particularly as it passes the A pillars and the rear view mirrors, which I seem to recall was a significant source of noise. Possibly, there was no added sound reduction benefit to putting the thick glass on the rear windows.
It would be nice to hear from a source that could provide a definitive answer.

Q5 Bob

I picked up some good information here. I didn't know the 2016 A6 had acoustic glass in front. I went out and checked the car, and yup. Thanks. The ride is very quiet even with the 19" tires.

m444

2016 Audi A6 and S6 first drive | Autoweek

"Audi has kept the interior in the A6 unchanged for the most part, with the biggest practical change aside from the infotainment upgrades being the addition of noise suppressing acoustic glass all around. The result isn't quite like being inside an armored A8, but the level of road noise is impressively low."