Agreed, ABS, interesting that the OP apparently has never experienced this in other cars.

ABS has been around for a long time.

First on the 1966 Jensen FF AWD with Lockheed ABS, the '69 Thunderbird (rear only) and the '73 Chrysler Imperial and popularized on the mid '70s S Class with modern electronics.

Edit: I would add that light application of brakes on snow usually does not activate ABS (it depends), it will most certainly activate with very light application on ice.

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"He who is not contented with what he has, would not be contented with what he would like to have". Socrates -469-399 BC