Quote:

GRASS/GRAVEL/SNOW
This program should be used where
a firm surface is covered with loose
or slippery material.

Note: For deep gravel, it is recommended that
the Sand program is selected.

Note: If the vehicle is unable to gain traction in
deep snow, switching Dynamic Stability Control
(DSC) off may help. DSC should be switched
on again, as soon as the difficulty is overcome.

No matter what you engage ....hitting ice at 50 is never going to end well ....GGS is there to help but its not a miracle solution if you lose traction ....always drive to the conditions