Go to the Self serve junk yard and snip off a connector from W140. Plenty to choose from.. Assuming you are in the lower tip of california. Go to the Chula Vista yard...

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If this helps any, this how I fixed the rubber seals on a late model W140, but the connector disassembly is of help to you. You just have to solder the new pin on..

DIY Side mirror rubber seal fix for late model W140's - Mercedes-Benz Forum

Martin