In my new manual on page 11. ADJUSTING THE DISPLAY CONT'D

Setting the Vibration Switch

(Abridged Version)
1-Press & hold SETUP (the program keys will appear)
2-Press OTHER
3-Using the number keys, enter 985
4-Press HOME twice to exit & return to the last device menu
To turn vibration switch back on, repeat steps 1 to 4

Of course, my Kameleon is only a few days old and yours may not accept 985!!
Hope this helps!