I need two of them to fix a massive fuel leak on my 300SDL, I tried the dealer but they have tried twice to order them and said some are available, but they aren't showing up. I have the old one, but I am not sure where to look to find a replacement.

https://www.pelicanparts.com/More_Info/0049974540.htm?pn=004-997-45-40-M14

You need o rings too
https://www.pelicanparts.com/cgi-bin/smart/more_info.cgi?pn=017-997-41-48-MBZ

__________________
1998 Ford Escort ZX2 5 speed - 279,000 miles My Daily

1992 Mercedes 300D 2.5 202,000 - Pure junk
2000 Mercedes E320 Black - 136,000 miles - Needs repair

Don't forget to grease the screw and threads on the spring compressor.

Which crush washer are you dealing with? On the filter housing? If they're aluminum, try rubbing them on some 800 grit sandpaper to knock the burrs off, I've had very good success that way. Banjo fittings have a crush washer on each side of the fitting, if you're missing one, it'll leak like a sieve. Copper crush washers are a use-once-then-replace item.

__________________
Current stable:
1995 E320 149K (Nancy)
1983 500SL 120K (SLoL)

Black Sheep:
1985 524TD 167K (TotalDumpster™)

Gone but not forgotten:
1986 300SDL (RIP)
1991 350SD
1991 560SEL
1990 560SEL
1986 500SEL Euro (Rusted to nothing at 47K!)

Oops, here it is.

https://www.pelicanparts.com/More_Info/007603014102.htm?pn=007603-014102-M131&KeepHeader=Y

__________________
1998 Ford Escort ZX2 5 speed - 279,000 miles My Daily

1992 Mercedes 300D 2.5 202,000 - Pure junk
2000 Mercedes E320 Black - 136,000 miles - Needs repair

Don't forget to grease the screw and threads on the spring compressor.

There are 2 different sized crush washers used. I believe 10mm and 12mm (though it may be 12mm and 14mm, I don't have my spare stuff with me to measure). Autozone and most parts houses carry them if you know the size you need, they're common on drain plugs.

__________________
Current stable:
1995 E320 149K (Nancy)
1983 500SL 120K (SLoL)

Black Sheep:
1985 524TD 167K (TotalDumpster™)

Gone but not forgotten:
1986 300SDL (RIP)
1991 350SD
1991 560SEL
1990 560SEL
1986 500SEL Euro (Rusted to nothing at 47K!)

It's for the lines coming out of the bottom of the tank, so it has been dripping on the cv joint and getting sprayed all over everything. I am not sure that those ones are the same (different part number) but for the price its worth a try so I ordered a couple. It's going to end up taking 3 weeks to finish a job I hoped would take 30 minutes, I guess that's part of owning an old car now that pretty much everything has to be ordered though.