Hi a3 owners!

i've been experiencing this ever since i got the car and have been tryin to fix it ever since. going over some moderate bumps its kinda noisy at the back in the trunk (rattling, clunkin, clapping). its empty except for the spare tire and equipment and those are secure, and the trunk lid is secured using the velcro fix.cant find the source of the noise but its definitely driving me nuts coz chicago's got real crap roads.arent audi's supposed to be rattle free? anyways is this something we cant help?

Thanks!