The 2017 Audi SQ7 4M 4.0 V8 TDI uses the Audi Active Sound System which is a synthetic exhaust noise played through the speakers that is matched to the revs. This video shows the difference between Comfort mode and Dynamic mode. Follow me also on: - Facebook: http://www.fb.com/NM2255 - Google+: http://plus.google.com/+NM2255 - Instagram http://www.instagram.com/nicknm2255/ - Twitter: http://Twitter.com/NM2255 - 2nd Car Channel: http://www.YouTube.com/NickCarVideos