Michelin is definitely the way to go! My E320 came with Conti which was a decent tire. Replaced them with Michelins and will never go back.
Mercedes + Michelin + Mobil 1 = SUCCESS

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Donwo
1999 SL 500 Sport (30K miles)
1998 E320 (SOLD)
1989 560SL (SOLD)
1987 300E (TOTALED)
1986 300E (SOLD)
1984 300SD (SOLD)