I hadn't seen a post about these. Here is another Russian site with free access to Mitchell repair data. It is only for the wiring diagrams but these might help someone:

1997 C230:
http://www.autolib.diakom.ru/CAR/Mer...NG%20DIAGRAMS/

1997 C280:
http://www.autolib.diakom.ru/CAR/Mer...enz/1997/C280/