Can't open door...Help

HMMM.. After seeing these pics of that latch assembly it does not look all that rusty/corroded to me. I'm thinking something else is causing the problem.
Agree, it looks good. I’m thinking the lock is somehow not disengaging. I’ve had that before with a Mustang. I’d have to move the lock knob up and down several times then it would release and voila, the door would open.