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Old 12-11-2003, 07:52 PM
jhal's Avatar
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Join Date: Dec 2002
Location: Brooksville Fl
Posts: 226
Question o-ring for dipstick tube

Hello everyone, I need to know what size o-ring is on the dipstick tube where it bolts to the transmission. I have an '85 300D and it is leaking from there. I want to have o-ring in hand when I repair it. Thank you in advance, John.
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Old 12-11-2003, 10:15 PM
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Join Date: Apr 2000
Location: Falls Church, VA
Posts: 5,315
You can get the o-ring from a dealer. for about a buck

The problem that I found is that you need to goop it up with RTV sealant when you put the tube in with the new o-ring, and then quickly secure it to the engine so it cannot move as it hardens. If the tube moves around it will start leaking again.
Chuck Taylor
Falls Church VA
'66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe

Last edited by ctaylor738; 12-12-2003 at 06:38 AM.
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Old 12-11-2003, 11:30 PM
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Join Date: Apr 2001
Location: Joliet Illinois
Posts: 309

You can get the dipstick 0-ring from Fastlane (at least I did for my 300e) and the rubber ring for the oil filler cap too.
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Old 12-12-2003, 07:20 AM
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Join Date: Jun 2002
Location: Cumming Ga.
Posts: 238
The part number is 016 997 29 48. If everything is clean when you reassemble you shouldn't need any sealer on o-ring. Using sealer just makes it more difficult to clean the next time you have to remove the filler pipe.
Mercedes Benz Master Tech
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Old 12-12-2003, 11:58 AM
jhal's Avatar
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Join Date: Dec 2002
Location: Brooksville Fl
Posts: 226
Thank you all for your replies.
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