I have the 98 C230 W202 with M111.974. I would guess the serpentine belt mounts about the same (I could be wrong of course). The main difference is likely that the access is harder because of the duct running across the front of the engine for the compressor system.

Assuming the two engines are the same then this video might help you locate and remove/replace the belt:

https://www.youtube.com/watch?v=xSDmtxilH1c

__________________
1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine)
1988 F150 144,000 miles (leaks all the colors of the rainbow)
Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra