Negotiated with M-B dealer to substitute these NON runflats for the factory set. I am glad I did.
In Colorado my biggest challenges are snowpacked and icy roads more than deep snow, with occasional bouts with the dreaded Black Ice. These tires are exceptional in those conditions, with much better road feel than my General Altimax studded, Michelin x-Ice2 and Blizzaks on other autos. I didn't pray for the day when I could finally get my winter tires off! Very impressive.
I started in November 2010 and experienced all of the above at a variety of temperatures from water on ice to powdery and frigid to black ice on I-80 at 75 mph with surprise BIG crosswinds. Exceptional tires that reduced the white knuckle cross country experience.
These tires are also pretty sporty in the dry, so I thought I'd wear them through the summer months because my 8-mounted-tires-per-vehicle habit has caused me to run out of winter tire storage.
We had lots more than usual 90+ temps, but the tread didn't melt away like other dedicated winter tires.
I have 6/32 tread left, which projects out to about 24,000 miles. Not bad for a winter tire pressed into hot summer service. We'll see if they get noisy when they get under 5/32, and how well they work in the wet.
We tow a 27' travel trailer and the tires are very stable with a load - inflated to the M-B recommended pressure of 38 lbs.
I also spent several days four wheeling on the legendary Ouray, Colorado extreme passes and I was really surprised how well the tread worked on rocks and other obstacles. Especially impressive on slick rocks in the rain! (Deflated to 28 psi.)
These are great tires for the difficult to predict Colorado driving conditions.