a3 sportback knocking noise under floor??

[davelympany]

Hi Guys, 18month old a3 tdi seem to have devloped a small `knocking noise `when car goes over lots of bumps at 21k miles under floor pan somewhere just wondered if anyone has had simular issues?? ........I cant see it being a worn bush at such a low milage?? If I take it to dealers theres nothing they could do anyway so early I cant see it being dangerous looked underneath shook car, nothing......strange.........

Dave

[davelympany]

It was a bottled water under the seat that was wedged and was hitting the seat everytime went over a bump!!! lol