I had a good amount of water in the foot well of ONLY the back passenger (right) side floor. The water does not extend past the floor vents (does not go towards the front seat).

I had this same issue 8 months ago and Audi said they cleared the drain pipes. How do I check / do this? Should it really be clogging this often? (Poor design)... Anything else it might be?

2011 Audi A4 B8

 

I did search and most came back left side or not for B8. Does anyone know exactly what it would be for ONLY the right side rear? Also wtf because the stealership already did this