Intermittent rattle from rear

A

And1

Guest
I have a intermittent rattle from rear of car sounds like from around c pillar has been in to audi twice now the 1st time for rear shelf which was cured then a new c pillar trim and 4 days later noise is back any ideas b4 I ring garage again!
 
I had intermittent rattle from the rear too. Turns out it was just a can of deicer i left in the door card storage bin!