Why go to flight on the ground if you don't need to?
Don't you mean "Idle"? How do you take off without going to "Flight"?
The audio warning is part of the mod I referred to. Not all 109S's have it; the later ones (after serial 22045) do have it as standard. For earlier airframes it came out as an optional BT (109S-16, dated October 2007), requiring something like 28 man hours to retro-fit.
Without the mod there is
no audio warning. Also, the yellow strip when 102% N2 is set can mask the adjacent yellow one for OEI. Also, the No2 engine control knob is hidden under the collective.