In principle, they're the same. The nuts and bolts are different. Under the passenger side floormat toward the dash there is a connector where you can access the codes.

http://www.benzworld.org/forums/w124-e-ce-d-td-class/1308759-cabriolet-top-mech-relay-clicks-no.html
http://www.benzworld.org/forums/w124-e-ce-d-td-class/1373074-uh-oh-95-cabriolet-top-stuck.html