My 300d has some chewed up vac lines on the passenger side floor. Door locks weren't working, car wasn't always shutting off, jerky shifts. So I basically unhooked them from the engine side. Car shuts off right away now, shifts nicely, but now the heater doesn't turn on. There were a couple vac lines on passenger floor that headed up towards the center console. Anyone know if those are for climate control?

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1980 300D, 128K

All the vacuum lines on the floor are related to door locks and trunk locks/gas door locks.

The ones that run under the center console are those that come over from the driver's door, which is where the master vacuum switch is located. The ones that run along the passenger door sill go up inside the passenger door. Then the ones going back go to the rear door, the gas door lock, and the trunk lock.

Can you take a picture of how the vacuum lines are currently under the hood?

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1979 300D 040 Black on Black - 1985 300D Maaco job (sadly sprayed over 199 Black Pearl Metallic) on Palamino

http://i.imgur.com/LslW733.jpg

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Vacuum Door Locks diagram:
see attachment

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Nosce Te Ipsum "Know thyself"

thanks for that. i'm going to have to take a look at what i unhooked in the morning. from that diagram it looks like there are only two vacuum lines crossing the firewall that are related to the locks. i think i unhooked more than that but i'll see.

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1980 300D, 128K

Well again if you can share a picture we can help...

But, in the meantime, there indeed are just two lines for the lock system. The solid yellow line goes in to the driver's door to the center connection on the master switch. The yellow with grey stripe goes to the vacuum reservoir. They should be attached to a yellow check valve with two connections on the firewall facing side, one connection on the engine facing side. Your climate control line is green with a yellow stripe I think it is. It often shares a 4-way connector with the locks.

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1979 300D 040 Black on Black - 1985 300D Maaco job (sadly sprayed over 199 Black Pearl Metallic) on Palamino

http://i.imgur.com/LslW733.jpg

The Baja Arizona Oil Burners Send a message if you'd like to join the fun
Left to Right - UberWasser, Iridium, Stuttgart-->Seattle,, mannys9130

Visit the W123 page on iFixit for over 70 helpful DIY guides!

yes - i unhooked the green with yellow line! that's my problem. can't quite figure out where it went though. anyone have a diagram for this?

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1980 300D, 128K

i could hook it into that line where the golf tee is, though i don't think that's where it was originally. i think the two yellow ones were hooking in there.

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1980 300D, 128K