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Old 10-18-2001, 05:47 PM
Posts: n/a
Another vacuum question: 72 350 SLC Euro

Does anyone have a diagram for this car? Is it on the CD's?

The independent shop that has my car is not having any luck finding one. I figure it would be in the M116 manual, but don't want to lay out the cash yet if I don't have to.


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Old 10-19-2001, 12:09 AM
Senior Member
Join Date: May 2001
Posts: 104
Steve, If the diagrams that you need are for ignition or emissions they should be in the engine manual. If they are for the climate control there is a seperate climate control manual. If you have no luck e-mail me, we may have these where I work.
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Old 10-20-2001, 05:36 AM
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smoke gets in your eyes
Join Date: Jun 2000
Location: SF Bay Area
Posts: 18,745

The only vacuum connections covered in the US M116/7 manual for that vintage are the lines between the throttle body and the swtichover valve and the switchover valve and the distributor. The throttle body connection is in the middle of the switchover valve.

A diagram in the fuel injection system section suggests that there's a retard line between the rear side of the throttle body to the rear fitting on the distributor vacuum advance unit. This diagram doesn't show a switchover valve along the advance line.

There is some mention of a fuel evaporation control system. There's a mess of hoses in the fuel tank area and one hose that leads to an unspecified location in the engine bay. The hose looks more like a fuel line than a vacuum line.

Aside from the hard plastic(?) line to the brake booster, the other vacuum lines around the engine are probably for the central locking system. I don't have an R107 manual to validate this notion.

If your car was brought into the US, maybe it was retrofitted with emission contol equipment for a later model year.

I replaced the fuel injection wiring harness of my dad's US spec 71 300SEL 3.5 and I don't remember there being a lot of vacuum lines. Certainly not nearly as many as on my US spec 78 450SEL.

91 300SE
81 300SD
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Old 10-21-2001, 11:44 PM
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Thanks for the responses. Maybe I should look for the climate control manual.

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