I been having the same issue throughout the summer with my 2008, tried the spray routine worked well at first but in the last couple weeks it's not been successful. Took the fuse out that controls the interior lighting but the constant "door ajar" warning on the readout is annoying. Local dealers don't have it in stock. Tried a couple times ordering the part and verifying the part was in stock on both occasions prior to ordering and received an e-mail that the part (8T4Z7821813A) Is on a national back-order on both orders. Supposedly a dealer in Texas has one, ordered this morning.
Have no idea how many Edge's have been sold but seeing this affects up to the 2013 model it's no surprise it's the 3rd most back-ordered part.
Could someone give some insight on how to replace this latch assembly, I removed the door panel but could not remove the interior black panel to get to the latch after removing the bolts.