Working on my 1970 220D

Typical drivers door. Was hard to open and wouldn't lock.

Cleaned and greased with spray white lithium, wonderful results.

However, having trouble locking it with the key.

When I turn down with the key the actuator for opening in the lock itself is getting pressed it slightly.

Here's a video of what I think is happening.

https://vimeo.com/112956480

Here's what should be happening

https://vimeo.com/112957386


Question is if that play is supposed to be there, but held back by the spring?



Or if the large tab is supposed to rest on the lever for the opening mechanism. Notice my gap.



I'm leaning towards this spring being worn, and want to push it out and stretch it a little for more resistance. The tab is showing hardly any visible wear marks.

The only other suspicious thing is the mechanism that prevents the door being locked when it's open.

The arm that moves with the latching mechanism is slightly bent.

Door open


Door closed