My s class mercedes has ASR.
My c class mercedes only has ASD.

No, there is no ETS light, nor does it speak of anything in the manual. But I watched this video at the dealership, and my girlfriend pointed out that it said all C classes came with ETS. I think that is a good idea.
I do'nt really think snow tires are worth it for me? I only go up there maybe once a year, and I usually take the S class, much better for 110 mph driving, if you ask me. I have those chains that attach to your tires which are supposed to give you better traction?
Thanks John, you are a very nice man!