Funny this thread pops up as I was going to post an update.

After running about 2 thousand miles on my primacy's, my opinion is that they are not worth the added expense. My first set (7 years ago) where the conti tech (the 85$ ones) and they handled really well. They still had decent tread left when I replaced them. I believe i put about 60k miles on them give or take.

The primacy tires are a little bit squishy, and I feel sometimes when I corner hard that the tires seems to "roll" slightly. In a straight line they ride very well.

All in all, the michelins are slightly better, but not so good to justify an extra $40 per tire. I will surely buy the conti tires on my next set and will recommend them to all Mercedes owners.

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Eugene

10 E63 AMG
93 300te 4matic
07 BMW X3
14 Ford F-150 Fx2