Thanks so much... Those photos were EXACTLY what I was after! I just looked under my car and now clearly see the mounting holes where the horns attach.

Additional reading indicates DOT may have required removal of these secondary horns when my (gray-market) vehicle was brought into the US years ago--at least that's what another poster claims occurred with his gray-market 560. (Seems rather odd, since both sets of horns were stock on the US version.)

Anyway, restoring things properly shouldn't be too hard now, thanks to your help...

Much appreciated!

__________________
Eric

1991 560SEL-Euro (214,000 miles)
1989 420SEL (Retired from daily use at 325,000 miles; Use as donor vehicle)