Hi Frank, yes I realised it was an old thread, however it is the only reference to the stator shaft for the 722.0 that I could find on the internet.
As the stator shaft is still available from Mercedes (now £280 vs £50 ten years ago) it was clear to me that it is removable, so I had a go.
I heated the bell hosing on both sides.
Tapped from the rear using a suitable socket.
And it dropped out.