Note...

I just ran through your post and noticed on post #21 you have pin 87 listed as teminal #3 for voltage test...Pin 87 should be term.#1 , not 3....verify that as a typo before we continue as that would throw a wrench in the test procedure for ignition sw test...............

http://catalog.worldpac.com/mercedesshop/sophio/wizard.jsp?partner=mercedesshop&clientid=catalog.mercedesshop&baseurl=http://catalog.peachparts.com/&cookieid=21H0MN3YU26A0YL2Y3&year=1995&make=MB&model=E-320-001&category=M&part=Ignition+Switch