This sounds silly, I know but...I have a 1997 A6 Avant with quattro and a third row seat. I have owned this car for 7 years and do most maintenance myself, so pretty handy and knowledgable. However, the other day after checking tire pressures I actually wanted to take out the spare tire. It would not clear the third row seat. What is the trick? Remove the flip seat? Did not see any quick disconnects for it.