I would check the fuse on the OVP relay before anything, as that is ABS power source.
Do a search "OVP"

http://catalog.worldpac.com/mercedesshop/sophio/wizard.jsp?partner=mercedesshop&clientid=catalog.mercedesshop&baseurl=http://catalog.peachparts.com/&cookieid=21H0MN3YU2AJ0T1FOC&year=1996&make=MB&model=C-280-001&category=P&part=Overload+Relay

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A Dalton