New/Old 1970 280SE Owner, Tranny Leak Question - Mercedes-Benz Forum

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post #1 of 11 (permalink) Old 07-10-2014, 03:06 PM Thread Starter
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New/Old 1970 280SE Owner, Tranny Leak Question

Hi All,
I am recently new to the Vintage Mercedes owners club having acquired a 1970 280SE with 44K original miles. The car is a terrific time machine in original condition. Interior is great, exterior is quite good with a couple of small rust spots that need to be taken care of. The car sat for 15 years, so I'm dealing with all of the little typical rubber and seal component issues. Here are a couple of pictures of my new baby...

New/Old 1970 280SE Owner, Tranny Leak Question-outside-1.jpeg

New/Old 1970 280SE Owner, Tranny Leak Question-inside-front.jpeg

One issue that perplexes me, that I hope someone on this forum can help me with is a tranny leak from a component I have to admit I don't know what it is! It is on the LH side of the automatic transmission, above the pan, and just behind the bell housing. My first question is "what is it?" and the 2nd question is "how to repair the leak?"

I would appreciate any help I can get as finding literature and diagrams on the transmission is difficult.

New/Old 1970 280SE Owner, Tranny Leak Question-tranny-3.jpg

New/Old 1970 280SE Owner, Tranny Leak Question-tranny-4.jpg
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post #2 of 11 (permalink) Old 07-11-2014, 08:04 AM
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there is a o ring at the cover , fix it on the car , rotate cover so tabs line up with slots , push cover in , remove clip , replace the o ring , reinstall cover .you are done . you could also bend the tabs so you can push cover in just enough to remove the clip .[ not a great way ]
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post #3 of 11 (permalink) Old 07-11-2014, 09:19 AM
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The second one is the vaccum modulator ,has a vaccum pipe attached to it and connects to v. manifold near last. cylinder
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post #4 of 11 (permalink) Old 07-11-2014, 11:13 AM Thread Starter
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Thanks much for the information, this helps a lot! One additional question...any suggestion about how find out what the part number is for the o-ring so I can order one?
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post #5 of 11 (permalink) Old 07-11-2014, 12:42 PM
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the second one is the first one , the modulator is on the other side .this leaking cover is the reverse band piston
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post #6 of 11 (permalink) Old 07-11-2014, 01:17 PM
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I THINK the part is A 008 997 35 45 Seal Ring.

If you go to https://epc.startekinfo.com/epc/home.jsp
You can get access to the EPC, which is MB's parts lookup tool.

I found the part here:
Search by original / genuine spare part number

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post #7 of 11 (permalink) Old 07-11-2014, 01:36 PM Thread Starter
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Thanks! I just stopped by the local Benz dealer and they confirmed 0089973545 is the correct part number. Thanks to all for the help and info!
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post #8 of 11 (permalink) Old 07-11-2014, 07:21 PM
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if for some reason you end up with the wrong o ring , mail me the old one and will send you new one .need to match it .
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post #9 of 11 (permalink) Old 07-11-2014, 08:49 PM
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Best source of vintage transmission parts I've found is jaggi import in texas. Nice guy and knows/stocks what you need for old Benz.
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post #10 of 11 (permalink) Old 07-16-2014, 09:57 AM Thread Starter
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Thanks for all the info. I have one more question...what is the bolt head next to the reverse band piston cover? I am assuming it is an adjustment pin, and if so, what is the correct adjustment?
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