1981 US 300d non turbo. Previous owner removed all hoses from the 3/2 valve. I recently picked up a 3/2 valve from an 83 300SD. I don't need/care about EGR but I have read it may help me starting out in 2nd gear and a flare I have in my auto transmission shifting. If someone has a hose routing diagram that would be great... if I should just plug up the current 3/2 valve can someone let me know what holes to plug? See the setup I am working with below -

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here is the correct routing with the EGR removed (for testing purposes)
what would concern me more is you have no control rod or bowden cable going to your transmission

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1981 NA 300D 310k miles

Thank you sleepstar, those photos really help me out. I believe the 1980 and 1981 300D transmissions are quite different. There is no bowden cable or pressure control rod to regulate shifting. It is all controlled by vacuum. If you are not getting enough vacuum to the trans modulator then the transmission may not go into fourth gear so I am looking for vacuum leaks.

Nice picture sleepstar

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1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!

The .117 / .118 transmissions used on the non-turbos (some years) are controlled by vacuum only, there is no rod or cable.

My '80 has only a single white valve, but I have been told some have two or even three.

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Mac
2002 e320 4matic estate│1985 300d│1980 300td
Previous: 1979 & 1982 & 1983 300sd │ 1982 240d

“Let's take a drive into the middle of nowhere with a packet of Marlboro lights and talk about our lives.” ― Joseph Heller, Catch-22

ohhh for some reason i thought the vacuum only transmission was only on 1980

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1981 NA 300D 310k miles

Unfortunately not. It was available on .117 and .118 transmissions in 1980 and 1981 for sure - I think that was it but I'm not 100% sure. The irritating thing is that the pre-1980 transmissions had rods and no vacuum. I would have thought the number hungry gremlins at Mercedes would have given the second versions of these transmissions a different number to help us out; but they didn't.

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1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!

They showed up on 240Ds until at least 1983 as well.

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Mac
2002 e320 4matic estate│1985 300d│1980 300td
Previous: 1979 & 1982 & 1983 300sd │ 1982 240d

“Let's take a drive into the middle of nowhere with a packet of Marlboro lights and talk about our lives.” ― Joseph Heller, Catch-22

Progress so far... Does this look correct sleepstar?