Change the 2 plug connectors under each coil and drive the car .
http://catalog.eautopartscatalog.com/mercedesshop/sophio/wizard.jsp?partner=mercedesshop&clientid=catalog.mercedesshop&baseurl=http://catalog.peachparts.com/&cookieid=1LB01VIGK1LJ110N73&year=1997&make=MB&model=C-230-001&category=F&part=Spark+Plug+Connector