Actually, just the front bit, but I can't find that part, 617.070.01.30 (little piece) and 617.070.02.30 (big piece). I can, however, locate this part:

Vehicle: 1981 Mercedes Benz 300SD
Part: Vacuum Valve : 3/2 Way
3/2 way : White Plastic
Mounted on valve cover. Cam lever operated by linkage. Controls EGR, injection pump and automatic transmission via vacuum routing combinations. To view shopping cart contents, click the View Cart link above. Product Brand List Price Core Qty
Vacuum Valve : 3/2 Way 3/2 Way D3013-12188

This is what I've got:









Is that the right part to order or can I just get the piece I broke? I wonder if the 3/2 way would include this?

Thanks!

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1994 C280 204k miles

i have that thing completely disconnected on my car. I think all it controls is the EGR, i've just got a couple of golf tees in various places... No ill effects that i have noticed, it solved a vacuum leak, my cruise still works and my tranny shifts good. i asked many times what this thing did and i never got back a definitive answer?
Ryan

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83 300SD.......sold
96 integra SE....sold
99 a4 quattro....sold
2001 IS300.......sold
2002 330i.........current.
2004 highlander limited....current.

Are you saying that you're not even using it? You don't have any vacuum lines connected to this thing? That would be good news! But, I would still like to know what part it is and how/where I can get one.

Thanks for the info.

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1994 C280 204k miles

I'm sorry that I can't help you with finding the part, but I would like to add that when I accidentally left that disconnected, my trans. shifted very hard and the car wouldn't shut off.

Alex

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1983 300D (parked for four years)
2012 VW Sportwagen TDI Manual
2001 Miata SE
1962 Chevrolet Corvair Rampside

yup, that's exactly what i mean, mine isn't even connected. Where the vacuum lines tee off and go up to it i have stuck in golf tees. No problems shutting off or shifting here, and i know of at least one other SD owner that did the same thing with no ill effects.
Ryan

__________________
83 300SD.......sold
96 integra SE....sold
99 a4 quattro....sold
2001 IS300.......sold
2002 330i.........current.
2004 highlander limited....current.

Oh I see, you didn't leave it as an open, leaking vacuum system because you teed everything off. That's interesting. I actually thought about putting a vacuum restrictor in line with the hose that modulates the transmission. Does anyone know what color code that is? Thanks a lot.

Alex

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1983 300D (parked for four years)
2012 VW Sportwagen TDI Manual
2001 Miata SE
1962 Chevrolet Corvair Rampside

RG,

So, you close off the the four connectors on top top of the engine with golf tees? And what about the lines that would normally go to it? How did you close those off?

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1994 C280 204k miles

The plastic valves on the top of the valve cover remove vacuum from the EGR valve when the throttle is either closed or wide open. I think they are referred to as 'EGR cutoffs' in the vacuum drawings. If the line to the EGR valve is not plugged when removed, you will lose metered vacuum...your tranny will be hard shifting.

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D

My tranny definitely shifts smoother since I replaced that valve. Your broken part can probably be replaced as well. Don't know what the part #is but I'd try to get it rather then disabling it altogether.

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1982 300D Turbo "Helga"
380,000 miles

I tried to find the part number that is on these pieces, I posted them in my first message, and was unsuccesful. I haven't called the MB Shop yet to see if they can order because I might be able to fix it. I ran to the hardware store today and found some 3/16" spacers that might do the trick. I'll send some pics tonight when I get home.

Could anyone tell me what goes where

As you might be able to tell from the second picture, #3 hose broke inside the connection, so I know what/where on it. This hose and another are in a sheath together and run back behind the Fuel Filter to the four-way just to the right of the Injection Pump and in front of the firewall on the driver's side. So, I know where it goes, but the larger one in the sheath, I'm not sure, I think it goes to #2 and the EGR goes to #5 (although I can't say that I've ever seen the EGR hooked up since I got the car a few weeks ago, PO must had it disconnected???) and the rest are empty? If you can't tell what is number is what, it goes like:

1 2
5 4 3

Thanks.

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1994 C280 204k miles

you should disconnect your egr anyway, so why spend money on a system that isn't even connected? i dont think i did anything on top of the valve covers, i plain and simply took out the lines that went to it and stuck golf tees in them. The only lines that go there go to the EGR, which is disconnected, and mine was leaking causing all sorts of issues. Just my thoughts on the issue
Ryan

__________________
83 300SD.......sold
96 integra SE....sold
99 a4 quattro....sold
2001 IS300.......sold
2002 330i.........current.
2004 highlander limited....current.

Ryan,
Just to reiterate, you took all three lines out and plugged them? I'd considering doing that myself if nothing major would be changed. What change did you observe happened after you did that? Anything with the tranny? Thanks

Alex

__________________
1983 300D (parked for four years)
2012 VW Sportwagen TDI Manual
2001 Miata SE
1962 Chevrolet Corvair Rampside

i didn't even have to unplug all three, i think only one or two actually have suction to them, with the engine running, figure out which ones have suction, and plug them. No ill effects, i only got posotive ones, like an engine that would shut off and working a/c controls
R

__________________
83 300SD.......sold
96 integra SE....sold
99 a4 quattro....sold
2001 IS300.......sold
2002 330i.........current.
2004 highlander limited....current.

I can't really figure out what you broke... is it only that one tiny tip that goes into one of the hoses ? The one that shows in the first picture? Do you know anyone with a lathe ? With a four jaw chuck that can be trimed so that a tube could be slipped on it and glued with JB Weld. It would really help in the future when posting pics if you find a program which will crop your pictures to take out most of the background.... they take several minutes for me to download... Greg

Thanks for the tip on cropping the images, I'm sorry they were too large to download. If you look at the 3rd picture from above, these two halves should be one as shown in the previous pictures. If you look hard, you can see where they were once joined and where they broke at each of the connections.

The connection should have been continuous, front to rear. So, I ended up drilling through both pieces and inserting some spacers.

Also, I figured out that from the front, there are:

1 2
5 4 3

If looking at it from the rear (numbers don't correspond to how the numbered above), there are:

1 2 3
6 5 4

Number 1 and number 2 are connected via a small hole inside. Number 1 doesn't go all the way through to the front (hence only seeing a 1 and 2 only on the top). Also, there is what appears to be a bearing/bb near the outside end/edge of #1. The images I'm posting illustrate the air path between #1 and #2 and front to rear (it's all connected). Images are in no particular order.



As you can see, I broke the #1 connection piece on this side, it was fixed with a white spacer.



I know the picture of the engine doesn't show the two vacuum lines connected, but I did that after, and, the car DOES shift MUCH better than before. Don't know what else might have been affected by the fixup, but shifting, especially upshifts, are better.

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1994 C280 204k miles