Help needed with Trunk Lock on Type 44

[DAWSON-MD]

The trunk lock works in two ways.
1) lock works in conjunction with all the other doors.
2) trunk stays locked regardless of whether the other doors are locked are
not.

If I remember correctly (car and owner's manual are 30 miles away) turning
the trunk lock to the left sets the lock to operate with the doors, turning
right keeps it locked (what you call manual mode). My trunk lock didn't
"work right" for the first year of ownership either; until I read the owners
manual! Silly me!
Mike
83 Urq
84 4Kq
87 5Ktq
77 Ferrari 308 GT4