One problem related to mid/rear seats assembly has been reported for the 2009 Audi A4. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2009 Audi A4 based on all problems reported for the 2009 A4.
I had just gone to the grocery store and was unloading the back seat of the car when I noticed that the seat belt buckles were not visible through the slots of the seats anymore. I tried to feel for them and was unsuccessful. I then noticed that the entire seat was too far forward and the curved part at the back of the seat was no longer tucked to the seat back. As I was trying to see if I could put it back into position the seat completely dislodged from the car and the glue that was supposed to be attaching the seat to the car, the wiring and even part of the car itself was visible.