W123 Mercedes fuel filter crush washer upgrade (Stop that fuel leak)

The Aluminum crush washers used on the OM617, OM616 and likely other Mercedes is a common spot to have a slow fuel leak.

Many times that crush washer doesn’t seal up quite 100% so it seeps fuel.

There is also a later version of the housing (02 style) that uses 2 o-rings instead of a 1 o-ring and a crush washer to seal, but sometimes those housings would seep too.

Here is a super simple and cheap way to stop those pesky fuel leaks.

Things in this article/video
01 Style housing:
M2.5×10 O ring Bonded Washer
02 Style housing:
M2.5×10 O ring M2.5×14 O ring

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