I replaced my original fuel filter on my 95C280 (same M104 motor) at 80k miles. THe filter was fairly clogged. I'd imagine though you'd be fine until 90k miles.... and if it needs changing before hand, then it needs changing.
Mercedes-Benz recommends fuel filter replacement for gas motors at 60k miles, but it is not a requirement. They make that relatively clear in the maintenance manual.
Good luck in whatever you do.
2006 E350 w/ 155k miles (Daily Driver)
1993 300E 3.2L Sedan w/ close to about 300k miles
2003 E500 Brilliant Silver (Had 217k miles when totalled!)
1989 300E with 289,000 miles (had for <1 yr while in HI)
03 CLK 500 cabrio (Mom's)
2006 C230k (Dad's)
1999 S420 (Mom's/Dad's)
2000 C230k Sport sedans
2001 CLK320 Cabrio (Mom's)
1995 C280 My First Mercedes-Benz... (155k miles. EXCEPTIONAL AUTOMOBILE. Was Very hard to let go of!)