89 300E

Recently changed the window regulator, but now the drivers door lock won't turn with the key. Goes in nicely, but no turning at all... not one mm in any direction. Tried the other door and trunk and all seems well.

Suggestions of what to do or if someone has a write up on how to remove the tumbler from the door handle.

Read someone suggested a vacuum issue, but can't see the hose in the lock area.

Thanks.