I believe that my alda has started leaking. I am getting the black oil and i seem to be down on power. I saw a youtube video by dieselken. He says it is 10mmx2.5mm is that an OD of 10mm and 2.5 width? I found several combinations on mcmaster carr.

Hello - if our members are not able to comment on this, please feel free to give us a call at 888-280-7799 and one of our MB part specialists will be happy to get you sorted. Best of luck!

pm me where to send you one.

i've got a bunch of extras from when i fixed mine...somewhere.

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1991 300D

found em- headed your way!

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1991 300D

Hello Quahog, do you still have those o-rings? I also watched that video and am looking to get some o-rings but can not find anywhere I am living. I know the one that is in there right now is not working because i just took it apart yesterday. Please let me know.

Thank you

pm'ed

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1991 300D

It's worth adding to this thread that a 52mmID x 2.5mm O-ring is a good replacement for the outside seal. The original ALDA on my SDL didn't hold pressure at all. Leaked at the 2 halves and out the shaft seal. The outside seal that seals the 2 halves together was rock hard and shattered when touched. New O-ring did the trick. If taking the ALDA apart to replace the shaft seal, it seems to be a wise idea to replace the large O-ring at the same time.

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Current stable:
1995 E320 157K (Nancy)
1983 500SL 125K (SLoL)

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

Gone and wanting to forget:
1985 524TD 167K (TotalDumpster™) [Definitely NOT a Benz]