"fly XXX arrival, cleared for ILS 25L"
Two things here - picky, sorry.
One. Is fly the XXX Arrival and then cleared for the ILS meaning after flying the XXX Arrival, i.e., follow the Arrival and when you get to the int/final/approach bit, then "Descend" on the ILS.
Two. ILS implys going down the G/S, because the ILS is the G/S included, whereas the Loc is not, as you succinctly put it.
(and the magic word of all skies:
UNLESS VISUAL: "If you don`t have a glideslope indication when you should have one - then d-o-n-t descend)
@ cosmic
some might mistake automation on the flight deck with a sort of kitt mode...
What? Eartha Kitt?