Many of the people who attend this list are so into their Benz they cringe at the thought of 10K mile oil changes. But: there are those who have strictly followed the FSS and you might find their stories through the search archives under FSS on this site.
I change my Mobil 1 (0W40) every three to four thousand miles on my `98 C230 51K miles and never any kind of engine problem. And I regularly cruise at the highest possible speed the car is capable of.