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Tractor Talk Discussion Forum

O/T '84 Mercedes question

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MeAnthony

06-20-2007 20:50:25




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There's something in the trunk, a pump of some kind(?), between the left trunk hinge and the quarter panel. It comes on approx. every 30 seconds, runs for 15 seconds, gets pretty hot and has a squeak. There's a metal line coming from one end, runs along the quarter panel and ends by the tail light, pinched flat on this end. Looks factory. Same kind of line comes out of opposite end and runs forward somewhere, but I can't see where it goes, unless maybe if I pull the back seat out. Any idea what this thing is?

Thanks,
Anthony

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dhermesc

06-21-2007 06:06:47




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 Re: O/T '84 Mercedes question in reply to MeAnthony, 06-20-2007 20:50:25  
Just wild guess but it sounds like an air pump for the rear suspension. If your shocks leak (and they can be expected to after 23 years) the pump will be cycling all the time.



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MeAnthony

06-21-2007 05:26:59




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 Re: O/T '84 Mercedes question / More Info in reply to MeAnthony, 06-20-2007 20:50:25  
Sorry!

It's a 300SD. I looked in the book regarding the central locking system. According to what I found, it all works from vacuum generated by the engine-mounted vacuum pump and is stored in several tanks located around the vehicle. So I'm thinking this is something completely separate.

Thanks,
Anthony



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Ludwig

06-21-2007 07:48:55




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 Re: O/T '84 Mercedes question / More Info in reply to MeAnthony, 06-21-2007 05:26:59  
I've got an '85 190D and the central locking pump is under the seat. I'd have thought it'd be the same on a 126.
In that area I'd expect to see the motor for the antenna and the sunroof and nothing else. Could be the central locking though.

Go over to okiebenz.com and sign up for the Mercedes mailing list. Then go to buymbparts.com and call Rusty, he'll fix you up with a new pump.



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richardinnz

06-21-2007 01:05:14




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 Re: O/T '84 Mercedes question in reply to MeAnthony, 06-20-2007 20:50:25  
I had an "84 Merc 190D, that had pneumatic central locking, sounds like it might be the pump for that.



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WvaJim

06-21-2007 00:32:17




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 Re: O/T '84 Mercedes question in reply to MeAnthony, 06-20-2007 20:50:25  
You didnt say what model it is, seem to remember some of these had a pneumatic door and trunk lid closing feature. part of that?



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