I took a look at an extra W126 tail light assembly I had, and it looks like this procedure can be used on the W126s in addition to the W123s. I just may try it, (translates into: It probably ain't gon' happen). :p
-Joe

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'81 MB 300SD, '82 MB 300D Turbo (sold/RIP), '04 Lincoln Town Car Ultimate

Sooner or later every car falls apart, ours does it later!
-German Narrator in a MB Promotion Film about the then brand new W123.