Thanks "Q" was hoping you would chime in.
I changed the tires to 19" staggered but with new All Seasons Hancooks and they have an aggressive tread pattern. I mounted whatever the stock tire is for those rims. I don't think it's a tread or tire issue. I don't like it just cuts all power on the DSC.
I read an article when they first came out and the magazines did not like the all wheel drive.
My wife's GL450 is just unbelievable in the snow and ice....I know its not comparable in the years. I bought this for my college daughter but she cant drive it yet to school so its my winter car and I'm shaking it down for a year fixing EVERTHING before I give it to her. My Lex 460L just spins in the snow.
I was just expecting much better form this truck. I drove many foreign and domestic 4x4 in the snow and this by far the worst in terms of traction, yes I know the stock 17 inch tires will work better and snows will work even better....but tons of fun on a dry road

better than the GL that handles like a boat.
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2002 X5 4.4i Sport Wheels
2014 X5 35i M Appearance & suspension package
1995 Porsche 993
1972 Porsche 914-6
2020 GLE 450 Twin Turbo
2019 Alfa Stelvio 500hp Quadrifogilo
Many motorcycles