Apologies but i was reading this thread
https://www.sl113.org/forums/index.php?topic=22570.0 from 2015 and
I have a contribution but couldn't find a reply option within the thread so this is the next best thing.
I have a W112 1965 and I have both option 531-Automatic antenna (for built-in radio) and 219-Becker antenna on left rear fender
BUT the antenna is most definitely on the RH Front Fender- Drivers Side RHD.
