I got the 46mm socket from baumtools.com, but as mentioned above, the 1 & 13/16 should work. I believe there's enough room for that socket. The Baum tool has a very low profile and is made for tight quarters. My strainer was in very tight; I doubt pliers would have worked in my case.

The return hose to the left of the feeder hose came off with a 22mm offset wrench.

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Mike Murrell
1991 300-SEL - Model 126
M103 - SOHC
"Fräulein"