Hi - i have a 2016 A4 S Line... i love the car, however the sound system sounds so tinny and i get so much vibration from the rear speakers that i am forever changing settings and having to lower the volume... It just sounds rattly... I have owned the car from new last May... anybody else have a similar issue? 

Hi Samuel...welcome to the Forum

I have heard that this is quite common across the later Audi range especially with the Bose system....which is surprising really.

One way would be to remove door cards and panels and fit sound deadening pads to them and refit which would dampen the rattling, etc

Cheers  Trevor