this picture shows the w108 part
You need someone with real EPC to find the part number.
Call MB, it's called "scoop"
I bought a new hose a few years ago from
https://www.authenticclassics.com/Heat-Riser-Hose-from-Exhaust-Manifold-to-Air-p/auth-007732.htm
Looks like out of stock, maybe they will make more later?