Ainars, yes, you're correct. I was wrong earlier about the shifter cable not moving for 432. I suspect I have confused the shifter cable for the shifter lever inside the valve body, or possibly the shifter cable not moving in tiptronic. It was a couple of years ago, and I've slept since then
The selector lever on the gearbox definitely has positions for PRND432, even in the S version, however the diagrams for the valve body only show PRND and I'm sure when I had the valve body out of one that behaviour was visible too. So, the TCU is seeing PRND432 or PRNDS from the F125 (where 4 and S are the same) depending on the year, but the actual valve body doesn't care about anything after D as by then its all software control by the TCU.
Looking at the shifter, PRND432 and PRNDS are all definitely on the F125 with only the tiptronic controls on the shifter body itself (as far as gear selection). The shifter cable does not move in tip, so that operation is purely electronic. I think this is what I was thinking of in my previous post.