Join Date: Apr 2013
Location: Columbia, Missouri, USA
Mercedes air cleaner mounts are an exact replacement.
You were spot-on! After a little sleuthing, I found this:
Air Cleaner Mount for 1983 Mercedes 300SD
My article measures to within 1mm of diameter and overall length to this; I think we have a winner!
1988 Spider Veloce (with lots of 3D printed parts)