Want I am not Larry but I have changed my oil a few times. I usually wipe the filter canister out with a clean rag and put the filter and oring back in dry. Maybe you got a bad oring or it is not seated right?

Also don't forget those little orings at the bottom of the tube, you should replace them at least once a year their only a few cents.

BusyBenz the W126's uses a different filter can then the W124's. The W124's has crush washers.

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1999 SL500
1969 280SE
2023 Ram 1500
2007 Tiara 3200