Humm, this is interesting. My 195RB, also a 2016 has the Old style Murphy bed. The couch folds down flat and a board, when unlatched, folds down. The mattress is a tri fold that stores in the space between the bedboard and the front of the TT. BTW, we find the mattress very comfy.
New style 195RB's have a full mattress that extends into the basement (and blocks it, way less storage).
I didn't know the TT came with a fixed bed. I think it's a West Coast floor plan.
This is like mine.
https://www.rvtrader.com/listing/201...5RB-5001727393
To install the current style Murphy bed would be a major project.
Remove overhead storage. Cut up floor and reconfigure basement.
The 2016 and PRE style would require the latches, trifold mattress, couch and couch base, and a fold down bed board. Do able.