Ice - an abreviation for "In-Car-Entertainment" which is a street term commonly used to describe the Audio and Visual equipment a car is equipped with.
Such equipment as CD Players, DVDs, Subwoofers, LED's, Lighting, etc.
Aftermarket (fitted after you bought it) or factory fitted (came with the car).
"Wo man, check out the Ice in that ride!"
"Its Iced out!"