I'm trying to remove the ignition switch and I don't seem to be successful at the moment. Does it just 'pull out' from the back of the ignition cylinder?

I'm also confused at the actual part that is sold here on MS Fastlane
There are two listed for my MB with the same # but look different.
Here is the link,

http://catalog.worldpac.com/mercedesshop/sophio/wizard.jsp?partner=mercedesshop&clientid=catalog.mercedesshop&baseurl=http://catalog.peachparts.com/&cookieid=23P1DJ5V124G1ERS2Q&year=1985&make=MB&model=300-SD-002&category=All&part=Ignition+Switch


Thanks for any help.

__________________
Rick & Michele in California
1985 300SD Turbo Deisel
300,000+ miles

1963 Mercury Meteor Stationwagon
1959 Montgomery Ward Silver Pigeon Scooter & matching bicycle
1974 IH Scout 4x4