Knocking noise from rear of 2011 CC
 

Has anyone had a problem with a knocking noise from rear of CC?
I had a tire rod broken and replaced and now I have an even louder noise. Was told it was the floating caliper for rear brakes and extended warranty is refusing to pay for it.Just purchased the top of the line extended warranty and this is how Im being treated. So Not Happy.
I was told that there was a "memo" out regarding this problem but no recall.

Not liking my Volkswagen in Louisiana