Maybe what I am going to say is total mess, as I do not know W111 so well, but...
A friend of mine asked me exactly this question a couple of years ago. What I told him, based on looking at car pictures (and I just checked it) and the EPC was that:
1. A handle, PN A1117580002, replaced by A1117580102, went with the rear lid lock PN A1107500284, which was a lock fitted with a pad on trunk lid. It was the same lock as the glove compartment lock. This was for W111.014.
2. The lock you have, fitted on trunk wall, not lid, is PN A1117505184. This goes to W111.021 and W111.023. Handle does not go there for 111.021 nor 111.023. It does not fit. Owners, however, install it where they like it (picture).
I have no idea if what I say is correct, but this is what I found in the system. That is what I told my friend.