YES, it should work. If you look under your hood on the passenger side where there is a bunch of writing, it should say OBDII Compliant. Mine does and it was produced in 8/94, purchased in 10/94 as MY 1995. When it's hooked up to scanners, it works just fine, nothing missing or anything. Provides all info, to my knowledge.
But double check under your hood just to be sure.
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!)