Yeah, the older models need a different button block with the right keys (awful lot of versions, for right and left).
The newer ones have this universal touch panel. Not used keys are simply not visible due to missing illumination, but this can be activated, as well as the switch function itself, as I temporarly did to try out Ionization...but that works also for non-installed functions...
- Still needed is an updated parts list covering models from 2019 onwards!!!
(To activate the Ionizer there are some nitty gritty components necessary, like high voltage cables, eventually Ionizer-heads for both vent sides and the high voltage module mentioned above. With the right parts numbers one look out for inexpensive spares...