On the AMG website it says that:
AMG DYNAMIC SELECT lets you vary the shifting, handling and more with the touch of a console button. ECO, Comfort, Sport and Sport+ modes are joined by a new program specifically for slippery surfaces. There's also an Individual mode you customize to your own liking.

This is the only place I’ve seen the program for “slippery surfaces” mentioned. Those with E53’s - what is this?

Thanks

No “slippery mode” that I’ve seen. You can adjust the amount of ESP that is active between ESP on, sport handling mode, and ESP off. This will affect handling on slippery roads.

OK, thanks. I’m in Utah so wanting the E53 to do well in winter. The website mentioned this under the Cabriolet but not the Coupe. So I think it was copied from another place in error.