Only the very early 107 SLs had an oil cooler, but seeing some sedans did too, maybe someone here can help.
I just changed the rad on my 72 350SL, but re-used the existing oil cooler that mounts on one side of the rad.
I drained the cooler before removing and put the drain plug aside. When I went to re-install it, I noticed it had no seal washer. I checked EPC and they don't show a washer. (drain plug #17 in EPC diagram is part 0019971530 )
I measured the drain plug and it does seem to have a very slight taper. It gets tight when abut 2/3 in.
Anyone have any idea how this plug is supposed to be installed and sealed?
Some pics (don't ask why epc shows the drain at top! It is at bottom)
