My p38 front passanger door will not open from inside or out. With the window down I can move the auto lock button up & down & it will lock & unlock the other doors but not itself. When initially unlocking the doors, its button does not go all the way up as the others do. I can see it trying to come all the way up but it's like it gets stuck about 1/2 way then returns all the way back down. If I pull up & down on it repeatedly it will occasionally feel like it comes off the arm & is free but then I can push it back down & it reconnects to it & the cycle starts all over again. There has been a few times that moving it up & down fast & repeatedly that it does unlock & works fine for a day or so until it doesn't. Very annoying, especially when picking up a friend & they have to ride in the back, more less picking up a date. I've had the door panel off and everything is in order. Any thoughts?