guess you got a lemon. cheersyeah, no.
While the procedure in the manual is intricate and can be done, sometimes it just doesn’t work. IIRC, I had the dealer try to do it and they failed as well, despite the indicator that it was disabled which is what prompted me to recommend using FORSCAN to disable it - and the other chimes as well.
So, you have nothing to lose by trying the documented procedure other than some time and frustration. It may work. It may not work though.