I just got a set of Dunlop A2 Sports installed on my C230. (Purchased from Tire Rack) I stayed with the stock 205 55 16 size. What a difference over the Conti Sport contacts that came on the car. The noise level is much lower and the directional stability on a grooved or crowned road is much better. Traction appears to be good but I have not had the chance to take it around any good curves in the mountains yet. My wife (not usually into cars) noticed a big difference with the new tires and seems to enjoy driving the car even more. I have Mich MXV4 Energy + on my 300E and have liked them for everything but wear.... < 23K first set and the second set may make 32K if I am lucky. Maybe I will try a set of A2s for the E this summer.

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Dave
88 300E 250K Sold
2000 C230K Totaled @104K
2003 ML320 156K Sold
2009 E350 4Matic Sport 46K Sold
2011 ML350 60K Sold
2014 GLK350 46k
2012 GL450 55K