I can't answer your question because I don't know the answer. However, if you can get the part number from the original switch, you can see what other models it crosses over to. It could be the same switch, it may be something special. If you still have the original switches, you might just disassemble them and clean out the guts - it's often just crusty grease and oxidation that prevents operation. Usually they work fine afterwards unless the points are burned up.

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Current stable:
1995 E320 149K (Nancy)
1983 500SL 120K (SLoL)

Black Sheep:
1985 524TD 167K (TotalDumpster™)

Gone but not forgotten:
1986 300SDL (RIP)
1991 350SD
1991 560SEL
1990 560SEL
1986 500SEL Euro (Rusted to nothing at 47K!)