I too have noticed that in my 2000 C230 it is a bit harder to maintain a straight line in a crosswind. I have the stock 205 55 16 Continentals on it and I think that they may be part of the problem. It acts like there is too little castor in the alignment. I have not had it above 95 MPH yet but at 80 it was very nervous and required much more attention than my 88 300E. With only 8K miles I don't believe that wear is a factor. I will probably put XGTs or MXV4s on it when the time comes, maybe that will help.

__________________
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 Sold
2012 GL450 72K For Sale
2016 E550 Cabriolet 48K Sold
2015 GLK350 114K