Air con drain tube

[Alanmx2]

Hi all , I have 64 plate a4 black edition quattro saloon . My rear passenger foot well is wet and I'm told my Aircon tube is blocked . Does anyone know where its located TIA Alan 

[Steve Q]

Here's some links: 

https://www.audiworld.com/forums/a4-b8-platform-discussion-128/water-left-rear-passenger-floor-condensation-drain-problem-2826639/

https://www.audizine.com/forum/showthread.php/532742-A-C-drain