Impossible fingering in Mozart's KV 533 u.494 !

[supremnatural]

Hi everyone, so I got back at playing the piano with this wonderful piece.
I got the first page memorized and was happy to continue that way, but then, I saw THIS ! At the twenty-eighth bar, this genius-fucked-up composer made some crazy stuff (for you, it would be the fourth bar at 33s in this video :

) : In the book I have, the first three notes played by the right hand while playing the white note (english people say minim or half-note if I'm not wrong) have this fingering : 5-4-5 !

Did the editor mess up ? What would you do ? Is there actually a technique to play this ?

[brogers70]

I don't find that fingering horribly strange. If your thumb is going to hold the Bb while your fingers play the descending scale you're going to have to cross one finger under another at some point. Five under four is not bad especially since your hand is up off the keys a bit anyway because of the thumb being up on a black key. Keep relaxed, adduct your wrist a bit, and see if you can't make it work.

[hardy_practice]

For the scale in that bar I use 5-4-3-5-4-3.  Bach wouldn't have thought twice - which is where I think you should start.