Having just disassembled/reassembled the entire system to replace the heater core, I have a good idea!
It is fiendishly fiddly and access is very tight. The chrome faceplates - and thereby the entire assembly - are retained by three nuts behind them. One in the centre, one each side - you will need mini sockets and/or offset spanners. As a minimum access is required from the glovebox aperture, the radio slot and the nearest speedo/tacho aperture. I also had access from below having removed the air distribution plenum etc.
Once those nuts are removed the assembly can be eased back and down towards the radio slot and then the nuts pinning the four control cables to the lever assembly can also be more easily loosened, then the spring clips securing the outer cable sheaths.
That should enable the entire lever assembly to be removed and serviced/repaired - don't forget to replace all light bulbs while you are in there.
Good luck.
Speaking of replacing the levers, who knows how to do that? I see two nuts on either side of the assembly from backside of the dash. Looks like that holds the chrome cover plate on. Does it also hold the lever assembly to the dash frame as well?
I know you have to disconnect the cables from the levers, but is there anything else more complicated than that?
Thanks for the help because there isn't much about this stuff in the BBB and the 113 are quite a bit different.
Wallace