Well I sprayed WD40 from the top but it didn't help. It will occasionally unlock and feels very tight. I will remove the door panel this weekend for a closer inspection. I rather do this myself than paying 2 hour labor for a half an hour job.
is there an update to your door lock problem? I'm having the same problem now with my rear drivers side door lock and just wondering if i can fix it myself or bring to the dealer.
the reason i ask is because my warranty ran out so if possible id like to save a few hundred bucks cuz i know the dealer will charge a lot