I got a pair of Euro lights for my 300SD and decided to do the mod where you put the bulb holder and yellow bulb cover from a 2nd gen W126 fog light into the Euro lights to get yellow fogs. Well, I hit a block. The old bulb holder came out easily, but the holder from the 2nd gen W126 fog light appears to be too wide. The part that holds the cover to the bulb holder won't clear the opening on the reflector.

For those of you who've done this mod, did you run into this problem? If so, how did you solve it?

Here's a photo so you can see what I mean.

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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.